The product featured is a complete high performance and quality rebuild solution, for the MGB 3 Synchro (4 Hole Type) Late Gearbox Unit. The rebuild kit is equipped with the necessary bearings, gaskets and oil seals required to rebuild the unit. The rebuild kit is also compatible with the following gearbox types: MGB 3 Synchro, MG MGA 1500/1600, MG MGB GT 3 Synchro, MGB Roadster, MG MGA Mk2. The package contents are the following: 1x Constant Mesh Pinion Bearing, 1x Main Shaft Front Needle Roller Packet, 1x Main Shaft Rear Bearing, 1x Main Shaft Extension Bearing, 1x Lay Shaft Bearing Set (4 Hole Type), 1x Lay Shaft, 1x Oil Seal Set, 1x Gearbox Gasket Set. Please note we only use high quality branded bearings ensuring that our products are high in quality and performance.