Probably the biggest time saver in your arsenal a tumbler can make polishing metal clay a almost labor free task. This single barrel belt driven has clear tumbler is easy to monitor and very reliable.The barrel has a 3lb capacity however 1 1/2 lbs of shot is about right for most polishing needs. Please remember to add shot to order as the tumbler does not come with shot.The barrel is 5"L x 4-1/4"W x 3-3/4"HThe overall tumbler is 6-1/4"W x 8-1/2"D x 7-1/2"HMade in USA - 110v power source