The product featured is a high performance Constant Mesh Pinion Bearing which is used for the following gearbox types: Triumph Spitfire 1500/1300, Marina 1700/1800, Dolomite 1850, Ital 1300/1800, TR7, GT6 gearbox units. This product is compatible with 3 Synchro and 4 Synchro gearbox units. The package content consists of 1x Constant Mesh Pinion Bearing. Please note we only use high quality branded bearings ensuring that our products are high in quality and performance.