M&B Roller Material capability: lactoprene,prevent oil,high-wearable,high-flexibility M&B Small-size pully(φ166.5±0.5×φ148.7±0.3×8±0.2mm)M&B Queen-size pully(φ183.7±0.5×φ148.7±0.3×20±0.3 mm)Material capability:lactoprene,prevent oil,high-wearable,high-flexibility M&B Incisory Roller