I've used a wide variety of belt sanders over the years, and in my experience, some belts respond to specific tools differently. Just make sure you also choose the appropriate belt size to match your particular sander. These are a few of my favorite choices:TPmax 3x21 Inch Aluminum Oxide Sanding Belt Pack,12 Pcs(4 Each of 80 120 150 Grits) $15 at Amazon $14 at WalmartAolabela 3x21 Inch Sanding Belts 21 Pcs 7 Grits Sizes (3 Each of 40/60/80/120/150/240/400 Grits) Heavy Duty Zirconia Belt Sander Paper $25 at AmazonBoshcraft 21 Pack 3 x 21 I3x21 Belt Sander Sanding Belts 40/60/80/120/180/240/400 Grits $18 at AmazonSo now you've got your belt, but how long will it last? Changing a sander belt is simple. Before loading the new belt, you’ll notice a series of arrows on the interior loop.