IPU1012 Features: * Perfectly flat machined surface * Hard surface tension * Perfect flat sanding surfaces * Flexible * PatentedThis block is designed for sanding and prep work. It allows for easy use and much improved durability and firmness. H-1/2", W-2 1/2", L-5 3/8". Finally a small scruff pad that isn"t flimsy. A professional hand pad that you can really sand with. Its increased density above the original Dura-Block, allows for firm but contoured sanding. * Dura-Block Scruff Block Warranty: * Lifetime warranty does not cover abuse