21″ Mountfield M4984 Gearbox

21 MOUNTFIELD M4984 GEARBOX the total length is 525mm the shorter axle is 138mm and the longer one is approx 300mm and both approx 12mm in diameter.the axle for the pulley is approx 34mm long and 12mm in diameterthe casing is aluminium NEW but has some slight rust on shafts