Dura-Block AF4413 Black 2/3-Radius Sanding DurablockGet an professional finish with top of the line sanding blocks from Dura Block. Great for wet or dry sanding, the blocks are made from patented closed cell EVA rubber. They are sized and shaped to create flawlessly flat surfaces and or detailed contours without ripples or gouging. The AF4413: Uses 2 3 4" Width PSA (Pressure Sensitive Adhesive) Paper in cut lengths or rolls 1 3 4" height x 2 5 8" width x 11" length