Technical Specifications:1). Grain: alumina , zirconia, silicon carbide2). Grit range: #16---1203). Size:100X16, 115X22, 125x22, 150x22, 180x224). Backing: fibre paper Applications & Markets:The Velcron Disc is based on the large sandpaper back flocking, and then through the stamping machine with various types of stamping out. General product Product Advantage:1). Working life is long.2). Speedy heat dissipation, will not burn the work piece.3). High-quality of degree of finish.4). High quantity of grinding.5). Type:self-adhesive disc sand and brushed disc sand.