Features: Ensure that the mold layer is not damaged by the equipment during the lens polishing process, resulting in films bursting and reducing machining errors. Keeps lenses firmly during edging. Prevent the lens from being offsets during processing. Easy to punch, with good adhesion to non-sticky surfaces such as silicone. Due to its small size and light weight, these lens edges blocking pads can be easily carried along for convenient use. From lens manufacturing to repair, these pads are versatile and widely used in various lens processing scenarios. Specifications: Material: PEMaterial 24 size: Approx. 24x30mm/0.94x1.18inch 30 size: Approx. 20x30mm/0.79x1.18inch Package Includes: 1roll Lens Edging Blocking Pads(1000pcs) note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.