Dura-Block Ultra-flex 24" Hook & Loop Durablock AF4437Get 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 AF4437: For blocking large panels Accommodates a wide variety of paper Great for wet or dry sanding Size: 1 1 2" H x 2 5 8" w x 24"L