plano-convex,double-convex,plano-concave,double-concave Material:BK7,Fused Silica,ZnSe,ZnS,Si,Ge,etc.,Specification for lenses (Cylindrical Lenses) Material:BK7 ( Or ... Tolerance: ±1%Surface Quality: 60-40Surface Figure: λ/2@ 633nm on plano sideClear Aperture: >90%Parallelism:Bevel: 0.25mm x 45° Part ... 0128.673.43.0CXL512020.040.0500.0257.333.23.0CCL0110 Plano-Concave10.010.0-20.0-10.292.03.3CCL111010. ...