Features: 1.Perfect Fitment: Rubber oil seal fits for 49cc 50cc 66cc 80cc 2 stroke engine motorized bike, perfect matching, has a long service time. 2.Premium Material: Oil seal is made of premium rubber material, rustproof, high toughness, wear resistant, anti aging, stable and durable. 3.Function: Engine oil seal prevents sediment, dust, water from invading the bearing, limit the leakage of lubricating oil in the bearing. 4.Strict Standards: Built to greatly quality control standards, 1 pcs 15mm inner diameter and 1pcs 14mm inner diameter, compact and lightweight. 5.Easy Installation: Easy to install without any modification, direct replacement for the old or broken one, convenient for using, save your efforts. Specification: Item Type: Oil Seal Material: Rubber Standard: 1pcs approx. 15mm/0.59in inner diameter, 1pcs approx. 14mm/0.55in inner diameter Fitment: Fit for 49cc 50cc 66cc 80cc 2 Stroke Engine