For years 3M LEAP pads have been recognized by optical labs worldwide as the benchmark for quality lens edging pads. These pads offer the industrys best slip resistance, keeping lenses firmly in place during edging. These 1700M LEAP III finish blocking pads are 24 mm square, designed for generic use. 2000 pads/roll. 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.