5 arc sec fused silica wafer

{"cid":"91202165","title":"Primary Flat 16\u00b12mm Fused Silica Glass Substrates Wafer With Inspection Report 5 Arc Sec","imgUrl":"https:\/\/img.chinax.com\/nimg\/3a\/36\/3aa861d1ea68e16dd2b909ec613c-200x200-1.jpg","attrs":{"Brand Name":"BonTek","Model Number":"Glass substrates","Minimum Order Quantity":"5 pcs","Delivery Time":"2 weeks","Place of Origin":"China","Certification":"ISO:9001","Packaging Details":"Cassette, Jar","Payment Terms":"TT\/in advance","Supply Ability":"100000\/month","Damage Threshold":">10J\/cm2","Material":"Fused Silica Glass","Warp":"<35um","Perpendicularity":"5 Arc Sec","Inspection Report":"Per Request","Refractive Index":"1.46, 1.472, 1.50, 1.51, 1.523","Metal Impurities":"<0.2ppm","Bevel":"0.25mm X 45\u00b0"}}

{"cid":"91197370","title":"Penta Optical Prisms","imgUrl":"https:\/\/img.chinax.com\/nimg\/63\/56\/9bbbfdd8e0336916ee67fe3ae6f2-200x200-1.jpg","attrs":{"Brand Name":"JOPTEC","Minimum Order Quantity":"50 PCS","Delivery Time":"30 Days","Place of Origin":"HEFEI, CHINA","Payment Terms":"T\/T","Supply Ability":"5000000 PCS\/Month","Packaging Details":"Boxes","Material":"N-BK7, Fused silica or other optical glass","Dimension Tolerance":"+0.0, -0.2mm","Surface quality":"60-40 S\/D","Surface flatness":"\u03bb\/4 @ 632.8nm","Angle Tolerance":"\u00b130 arc sec(Standard); \u00b15 arc sec(High Precision)","Clear Aperture":">85% of dimension","Bevel":"<0.25mm\u00d745\u00b0","Coating":"Surfaces S1 & S2 :Single layer MgF2 coating,Surfaces S3 & S4: Aluminized and painted black"}}