Product Name: Single LensModel Number: LSC07Place of Origin: ChinaSpecifications: 1) Size range: 3 - 100mm 2) Diameter tolerance: +0 / -0.1mm 3) Thickness tolerance: 1mm 4) Centering tolerance: 3 x 5 5) Surface quality: 60/40 6) Surface accuracy: 3 - 0.5 7) Clear aperture: >85% 8) Bevel: 0.1 - 0.25mm x 45 9) Coating: according to your requests 10) Material: BK7, fused silica, quartz, SF11 and other optical glass, sapphire, CaF2, MgF2 The specifications will be different according to material and dimensions.