Double Convex LensesOuter diameter: φ 20.37~ φ 20.40 Thickness: 5.56-5.66mm Send InquiryLive chatProduct DetailDouble Convex LensesShare:PREVIOUS:Double Concave LensesNEXT:Double Convex LensesRelated ProductsFixed Focal Length Lenses-f 4.0mmFixed Focal Length Lenses-f 4.0mmOptical Spherical Glass FiltersHigh Reflection Mirror CoatingLacquering LensesFixed Focal Length Lenses-f 6.0mm