Universal Parts 164-13 GY6 Drain Plug Drain Plug for 150cc and 125cc GY6 4-stroke QMI152/157 QMJ152/157 engines and 150cc GY6B 4-stroke ZNEN engines commonly found in Lance Phoenix, Flyscooters Cadenza, ZNEN ZN150T-18, Xingyue ITA-150, Motorino Cassini, CMS Prodigy, BMS Pathfinder and many more. Outer Diameter of Cap: 39mm Thread Size: M30x1.50 Depth of Threaded Area: 8mm Overall Thickness of Cap: 20mm