Specification Binding : Office Product Brand : American Photonics Color : W/nozzles, (ALN tool) and BOSS LS ADPT Label : American Photonics Manufacturer : American Photonics MaterialType : ZeSe, Anodized Aluminum Model : LS-2065 PartNumber : Co2 Laser Lens ProductGroup : Art and Craft Supply ProductTypeName : ART_SUPPLIES Publisher : American Photonics Size : Kit 38.1, 50.8, 63.5, 101.6, lenses SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/41b6lWi6+dL._SL75_.jpg SmallImage_Width : 75 Studio : American Photonics Title : American Photonics 20mm Diameter Lens Tubes with ZnSe Focus Lens. Kit 38.1, 50.8, 63.5, 101.6, Lenses W/nozzles, (ALN Tool) and BOSS LS ADPT