Descriptions: Uxcell 4 x 36 600 Grit Flush Joint Aluminum Oxide Sanding Belts 6 Pack Size: 4-inch x 36-inch / 100mm x 915mm (Width*Girth). 600 Grit. Fits all 4X36 sanding belts. Material: Made with X-weight clothed backing aluminum oxide grains and resin on resin bond that ensures long lasting performance. Connection: Featured with flush joint seams. Designed with expertly crafted seams that the belt interface is firm and won’t break under pressure. Applications: Mainly used for wood aluminum metal glass plastic stone ect. Support for all type of polishing machines. Tips: Flush joint sanding belts can be run in either direction for quicker belt changes.