Description Starcke Zirconium Belts 20mm x 520mm is a heavy X-weight cotton cloth, Resin over resin Zirconia gives long life when grinding or finishing in a variety of applications; from removal of welding seams and deburring to paint removal. Can be used on metals, wood, paints, lacquers and numerous other materials. Starcke Zirconium Belts 20mm x 520mm will fit a variety of Air Sander machines including: Clarke CAT 70 Belton B-20 CL Baby Belton 20 B-20 NB Nitto Khohi BB20 Sealey SA 355 FEIN BF 10-280E Seco Beltit BG 20