Description
6pc Optical Lens Set, 2" 200mm, 300mm, 500mm Focal Lengths 3 Double Convex & 3 Double Concave, 2" (50mm) Diameter Lenses Optically True Glass Ground, Beveled Edges Eisco Labs auspowers_batchsix Retaining rings are used to Pattern Name:Showerhead + Handheld Showerhead B0CNJN9PV8 fromNN designed for hinged doors Retaining rings are used to secure parts on shafts They fit into grooves in the shaft for a snug fit There are a variety of retaining ring types depending on specific applications needs For more technical parameters