ITEM NAME:100Pcs Lens Pattern Lens template Optical Optometry For Lens Edger PVC Ed JCA_ Features: 1) Easiest Pattern Blank 2) Raised grids on one side 3) Semi-rigid plastic 4) Medium thickness 5) EASY to cut 6) EASY to read.(1) Easiest Pattern Blank. 3) Semi-rigid plastic. 7) Size: 67 57mm. 6) EASY to read.