This optical lens processing protector (1647) consists of 35mm round blue disks, which can be applied to both sides of lenses to prevent scratching during faceting, hand edging, drilling, polish edging, grooving and when shipping lenses. 3M medical materials and technologies helps health care manufacturers design and build more reliable, innovative and feature rich medical devices. Customers leverage 3M technical expertise to select materials and technologies that integrate together for their break through medical industry, device innovations designed for improving or enhancing lives.