New from KLINGSPOR, the UltraFlex Sanding Pads are the premium foam pads on the market. These incorporate a dense foam structure and a full, even coating of aluminum oxide grains. This makes for an extremely long lasting pad that is very flexible for finish sanding of contoured parts and profiles. the pad measures 4-1/2" wide and 5-1/2" long, 1/4" thick.