For sale is the motor pulley drive wheel, used in all National Geographic tumblers. May be used on, "Starter, 1 pound", "Hobby" and "Professional" units. These parts can wear out as the belt tends to slip, and causes heat which damages not only the belt, but also the pulley wheel. This is a direct replacement, just remove old unit ( you may need to use a pliers to gently " lever" off the old pulley, Starter 1# units will need the shell disassembled) and press this new one on and your good to go. New pulley is made from ABS plastic and is slightly wider than original to help reduce wear. This are not OEM, but rather a stronger ABS plastic. Sale contains ONE (1) Pulley, no barrel, no tumbler, just the replacement part. *NOTE- These will ONLY fit National Geographic tumblers, they will not fit other " CLONE" units on the market. If your tumbler does not have" National Geographic" printed on the tumbler, it is a clone and these will not fit. Please ask any questions prior to purchase.