Auto Vacuum Parts Features: 1) Shaft type: solid shaft, hollow shaft, multiaxial shaft 2) Housing type: flange type, bol Auto Vacuum PartsVacuum PartsBearings ... the ferrofluid according to customer' needs Product catalogue: Shaft type: Solid Shaft(S), Hollow Shaft(K), Multiaxial Shaft(D) Housing type: Flange type(F), Bolt ...