--- product_id: 81253389 title: "MCWlaser 3PCS 20mm CO2 Laser Mirrors Si Reflective Lens Gold-Plated Silicon for CO2 Laser Engraving Cutting Machine" brand: "mcwlaser" price: "€ 89.54" currency: EUR in_stock: true reviews_count: 13 category: "Mc Wlaser" url: https://www.desertcart.es/products/81253389-mcwlaser-3pcs-20mm-co2-laser-mirrors-si-reflective-lens-gold store_origin: ES region: Spain --- # >99.8% infrared reflectivity 5-layer gold plating for heat resistance 20mm precision diameter MCWlaser 3PCS 20mm CO2 Laser Mirrors Si Reflective Lens Gold-Plated Silicon for CO2 Laser Engraving Cutting Machine **Brand:** mcwlaser **Price:** € 89.54 **Availability:** ✅ In Stock ## Summary > 🔬 Reflect your laser’s true potential with MCWlaser precision mirrors! ## Quick Answers - **What is this?** MCWlaser 3PCS 20mm CO2 Laser Mirrors Si Reflective Lens Gold-Plated Silicon for CO2 Laser Engraving Cutting Machine by mcwlaser - **How much does it cost?** € 89.54 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/81253389-mcwlaser-3pcs-20mm-co2-laser-mirrors-si-reflective-lens-gold) ## Best For - mcwlaser enthusiasts ## Why This Product - Trusted mcwlaser brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Upgrade:** Ideal replacement for K9 mirrors in K40 and other 40W engravers, instantly boosting cutting speed and precision. - • **Precision 20mm Diameter:** Perfectly sized for optimal laser beam reflection and compatibility with 40-400W CO2 laser machines. - • **Ultra-High Reflectivity:** Reflects over 99.8% of infrared light at 10600nm, maximizing laser efficiency and minimizing power loss. - • **Vacuum-Sealed Packaging:** Individually packed to prevent oxidation and corrosion, guaranteeing pristine mirror quality on arrival. - • **Durable Gold-Plated Silicon:** 5-layer coating ensures exceptional heat resistance and long-lasting performance under harsh conditions. ## Overview The MCWlaser 3PCS 20mm CO2 Laser Mirrors feature gold-plated silicon with a 5-layer coating, delivering over 99.8% reflectivity at 10600nm wavelength. Designed for 40-400W CO2 laser engraving and cutting machines, these mirrors offer superior heat resistance, durability, and come vacuum-sealed to prevent corrosion. A direct upgrade for K9 mirrors, they enhance laser efficiency, speed, and precision. ## Description Product Description Attention Si reflective mirrors are made by multiple processes;Superb coating art,Precision slicing polishing and grinding processes,Excellent optical properties,High working efficiency,Long working life. Reflective lenses is used for planar reflecting the laser beam, suitable for CO2 laser engraving/cutting machines. Before replace or install the Si laser mirrors, please confirm the diameter firstly. Parameter Usually one co2 laser engraver needs 1 pcs focus lens and 3 pcs reflective mirrors. CO2 laser mirrors is used in CO2 laser engraving/cutting machines. Adopt closed vacuum packaging to prevent oxidation and corrosion. Review: Great Product - Great product, just watch out for the protective film on the mirror surface, hard to spot! Very quick delivery, brilliant price and performs very well. Really happy with these mirrors. Review: Wow, what a difference they make. - I replaced my Omtech standard mirrors with these and have to say I was sceptical at first, after 5 years I decided it was time to remove the originals and inspect them having cleaned them with alcohol wipes in situ previously. On removal the originals were in quite a state. I fitted the new ones and also aligned the mirrors, the difference was incredible, cutting could be done with less power and at higher speed, these mirrors were a total game changer and well worth the cost. ## Features - 〖Silicon Laser Mirror Size〗Material: Gold-Plated Silicon. Diameter: 20mm/0.79", Thickness: 3mm/0.12", Shape: plane. Transmittance (Reflectivity): >99,2%. - 〖Excellent Material & Exquisite Coating Technology〗Gold-Plated silicon, 5 layers Coated gold film, Coating is durable. Superb coating art, precision slicing, polishing and grinding process, high heat resistance, adapt to work under harsh environment, long working life. - 〖High Reflectivity〗MCWlaser's Si laser reflective lens has super optical performance and fast heat dissipation, high working efficiency, and minimizes light loss caused by reflection. Reflectivity to infrared light is up to 99.8% at 10600nm wavelength, minimizing power loss. - 〖Widely Application〗Si laser mirror is suitable for 40-400W CO2 laser engraving and cutting machines. It's great replacement laser lens to the K9 mirror for K40 and other 40W engravers. - 〖Package〗3PCS 20mm CO2 laser mirrors kit. Single piece independent packaging, Adopt closed vacuum packaging to prevent oxidation and corrosion. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B079FZQPCT | | Best Sellers Rank | 52,174 in DIY & Tools ( See Top 100 in DIY & Tools ) 24 in Engraving Tools | | Brand | MCWlaser | | Colour | Gray | | Country of Origin | China | | Customer Reviews | 4.7 out of 5 stars 430 Reviews | | Item Dimensions L x W | 20L x 20W millimetres | | Manufacturer | Shanghai Top Nine Industrial Co.,Ltd | | Material | Silicon | | Model Number | LM1-SI-20x3 | | Operation Mode | Automatic | | Operation mode | Automatic | | Part Number | LM-SI20 | | Product dimensions | 20L x 20W millimetres | | Style | Laser | | UPC | 642337974397 | | Unit Count | 3.0 count | ## Product Details - **Brand:** MCWlaser - **Colour:** Gray - **Material:** Silicon - **Product dimensions:** 20L x 20W millimetres - **Style:** Laser ## Images ![MCWlaser 3PCS 20mm CO2 Laser Mirrors Si Reflective Lens Gold-Plated Silicon for CO2 Laser Engraving Cutting Machine - Image 1](https://m.media-amazon.com/images/I/516FbwKSEVL.jpg) ![MCWlaser 3PCS 20mm CO2 Laser Mirrors Si Reflective Lens Gold-Plated Silicon for CO2 Laser Engraving Cutting Machine - Image 2](https://m.media-amazon.com/images/I/519IhD+C62L.jpg) ![MCWlaser 3PCS 20mm CO2 Laser Mirrors Si Reflective Lens Gold-Plated Silicon for CO2 Laser Engraving Cutting Machine - Image 3](https://m.media-amazon.com/images/I/61kSNJAYGmL.jpg) ![MCWlaser 3PCS 20mm CO2 Laser Mirrors Si Reflective Lens Gold-Plated Silicon for CO2 Laser Engraving Cutting Machine - Image 4](https://m.media-amazon.com/images/I/61xnIfEMdiL.jpg) ![MCWlaser 3PCS 20mm CO2 Laser Mirrors Si Reflective Lens Gold-Plated Silicon for CO2 Laser Engraving Cutting Machine - Image 5](https://m.media-amazon.com/images/I/719CGl2mqbL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Product *by J***T on 7 July 2025* Great product, just watch out for the protective film on the mirror surface, hard to spot! Very quick delivery, brilliant price and performs very well. Really happy with these mirrors. ### ⭐⭐⭐⭐⭐ Wow, what a difference they make. *by M***. on 28 September 2025* I replaced my Omtech standard mirrors with these and have to say I was sceptical at first, after 5 years I decided it was time to remove the originals and inspect them having cleaned them with alcohol wipes in situ previously. On removal the originals were in quite a state. I fitted the new ones and also aligned the mirrors, the difference was incredible, cutting could be done with less power and at higher speed, these mirrors were a total game changer and well worth the cost. ### ⭐⭐⭐⭐⭐ Withstands 250 W *by N***G on 8 October 2024* Tested on a 250 W CO2 laser (3 mm diameter) at max power for 10 minutes or so. Mirror heated up a bit, but no more than another gold mirror in the beampath which cost 25 times more (from Research grade supplier). Second product from this supplier I’ve tried. Slightly lower performance (mirror has a slight bevel to it, see photo) but price is right. I wouldn't do anything silly like touch the gold coating or try to clean it, so maybe not the best for dirty environment. ## Frequently Bought Together - MCWlaser 20mm CO2 Laser Mirror Si Reflective Mirrors Lens Gold-Plated Silicon 3PCS CO2 Laser Lens for CO2 Laser Engraving Cutting Machine - MCWlaser USA CVD II-VI ZnSe 12mm Laser Focus Lens Focal Length 50.8mm/ 2 inch CO2 Laser Lens for CO2 Laser Engraving Cutting Engraver/Cutter 40W-200W --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.es/products/81253389-mcwlaser-3pcs-20mm-co2-laser-mirrors-si-reflective-lens-gold](https://www.desertcart.es/products/81253389-mcwlaser-3pcs-20mm-co2-laser-mirrors-si-reflective-lens-gold) --- *Product available on Desertcart Spain* *Store origin: ES* *Last updated: 2026-07-07*