1.Corundum abrasive grain and full resin bond high abrasion performance. 2. X-weight cloth provide durability and longer belt life. 3.Premium Aluminum Oxide Open Coat material with grinding aid reduces heat and buildup. 4.They are ideal for: Wood and woodworking (hardwood and softwood). 5.Also excellent for: leather, rubber, plastic and light metal working of non ferrous metals (aluminum, titanium, brass, Bronze, copper). 6.Taped joint allows belt to be run in either direction for quicker belt changes. Specifications Product Name: Aluminum Oxide Sanding Belt Package Content: 4pcs x Aluminum Oxide Sanding Belt Material: Abrasive, Aluminum Oxide Grain Color: Brown Weight: 302g Grit: 800 Overall Size: 100 x915mm/4-inch x 36-inch(Width*Girth)