Product Name: 7 Styles Mixed Plastic Gear Bag Belt Pulley Color: White/Orange Model: 62A, 132A, 16.82A(orange), 182A, 242AB, 102B, 122B Note: 2A signifies a 1.95mm middle hole that fits tightly onto a 2mm shaft and rotates with the shaft. 2B signifies a 2.05mm centre gap for a free fit on a 2mm shaft, the belt pulley can rotate on the shaft. 62A: diameter 6mm, bore 1.95mm 132A: diameter 13mm, bore 1.95mm 16.82A: diameter 16.8mm, bore 1.95mm 182A: diameter 18mm, bore 1.95mm 242AB: diameter 24mm, middle bore 1.95mm, eccentric bore 2.05mm 102B: 10 teeth, diameter 12mm, bore 2.05mm 122B: 12 teeth, diameter 16mm, bore 2.05mm Pack Quantity: 1 Pack(7pcs)