IPU1007 Features: * Perfectly flat machined surface * Hard surface tension * Perfect size for doing medium to small panels * Flexible * PatentedThis block is designed to allow the user to accurately block flat panels and panels with slight curves. H-1- 3/8", W-2 5/8", L-11". Great density for blocking to perfection. * 2/3 Dura-Block 10-1/2"" Sanding Block Warranty: * Lifetime warranty does not cover abuse