🏍 Fitment - Compatible with Standard Case GY6 60cc 139QMA 139QMB Engine(Used for 669 Belt),for 44mm Cylinder and Cylinder Head
🏍 Specification - Inner Diameter of Cylinder: 44mm,Outer Diameter of Piston Pin: 13mm
🏍 Material - Made of aluminum alloy, it boasts light weight, excellent heat dissipation, and high strength and stiffness to withstand cylinder pressure and loads.