3 days delivery for on-shelf products or 2 Weeks for samples. Free design services. Direct supports from Canada office. 3 days delivery for on-shelf products or 2 weeks for samplesFree design ServiceODM or OEM services available Supports from Canada officeAs large as 400mm diameter availableMain Specifications: MatericalBK7 or other optical glass, Fused Silica, CaF2, ZnSe Diameter Tolerance+0/-0. ...