Motorized Bicycle Silver 1.5" / 1" CNC Adapter For 49cc 50cc 66cc 80cc 2 Stroke Bicycle Sprocket YOU ARE BUYING A TC 30X44X8 SEAL. THICKNESS: 8mm Replacement parts,non original. Upgraded Spring Loaded Chain Tensioner for Motorized Libya Package include:1 x CNC Adaptor 2 x CNC Reducing Gasket Reminder/Note: To Ensure You Purchase the Correct Product, Please Read the Description Carefully. The measurement of the actual items may slightly different from the listing images due to manual measurement,please allow 0.5-1mm difference. Thanks for your understanding. Aazon.co: sthus Black 1 25 / 1.5 38 CNC Adapter Fits 49cc 50cc...