Piston diameter: 45 mm, piston height: 55 mm.Piston rings: 2 pieces, each 1.5 mm x 45 mm.Piston pin diameter: 12 mm, piston pin length: 37 mm.Includes 2 piston pin retainers.Base hole spacing: 45 mm.Color as shown in product images.Number of pieces: 17.Package content: 1 cylinder, 1 piston, 4 piston rings, 1 piston pin, 10 gaskets.This gasket kit is designed for use with models WM80, BS500, BS600, and BS700.The 45 mm piston diameter and 55 mm piston height support consistent engine performance across various applications.The cylinder is compatible with models manufactured between 1980 and 2011 that do not have a catalytic converter.A startstop button on the housing supports functional integration.The kit includes 10 gaskets, selected to withstand operating temperatures up to 105℃, helping maintain a sealed environment during use.The metal construction and 45 mm base hole spacing provide structural stability and alignment with designated mounting points.Designed for straightforward identification and installation, this kit supports efficient engine assembly and maintenance for both professional and personal use.Compatibility Notice: This is an aftermarket product.Mention of brands is for fitment identification only.