ITEM NAME:Stud Bolt Engine Cylinder Barrel Head Bore for Peewee PY PW 50 Yamaha Description: - 100% Brand New and High Quanlity - Material: Pure iron - Size: 11cm/4.33inch - Fitment: For Yamaha PW50 - For Yamaha PY50 Package Included: 4 Pieces Cylinder Studs 8 Pieces Stud Nuts.8 Pieces Stud Nuts. - For Yamaha PY50. 4 Pieces Cylinder Studs.