biconcave glasses

{"cid":"91201126","title":"46mm Round Biconcave Optical Glass Lens Double Concave Lens","imgUrl":"https:\/\/img.chinax.com\/nimg\/8c\/2a\/93df2a903e09608a16bb38094cf1-200x200-1.jpg","attrs":{"Price":"$0.36~$1.8","Brand Name":"Adance","Model Number":"005","Minimum Order Quantity":"100 Pieces","Delivery Time":"7~35days","Place of Origin":"Shanghai, China","Payment Terms":"L\/C, D\/P, T\/T, Western Union","Supply Ability":"10000000 Piece\/Pieces per Month","Packaging Details":"Vacuum+EVA+Carton","Customized support":"OEM, ODM","Use":"optical","Material":"Metal+BK7 or others optical glass,quartz,sapphire,Si,ZnSe,CaF2 etc.","Focal length":"+\/-3000mm","Coating":"Upon request","Diameter tolerance":"+\/-0.005","Thickness tolerance":"+\/-0.01","Surface quality":"10\/5~60\/40","Surface Accuracy":"N=1~3","Application area":"Lighting,Laser etc"}}