2-Pack Round Fresnel Lens Diameter 120mm(4.72") Focal Length 220mm(8.66") Acrylic Ultrathin Magnifier for solar heating experiment，solar concentrator，fire cooking，education</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>2PCS/Unit large fresnel lenses</li><li>Size:Φ120mm， Focal length:220mm， Thickness:2mm， Material: PMMA (Acrylic)</li><li>Visual Aid for education - Great for solar heating experiment， DIY Solar Cooking， DIY Solar Heater， For Scientific Research</li><li>High light transmittance， High efficiency in focusing， High precision.</li><li>We are professional factory for high-precision optical lens， fresnel lens， solar lenes.</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41mlLddCNlL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41Ibc-njliL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41uNCdXFW9L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51xYNFqcSNL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51EvCIy9HZL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51rjRb0B5iL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51NnX3BLX1L.jpg' noproxy></br>