Class: Type 4SP-4 ply steel wire spiral medium pressure rubber hose
Type 4SH-4 ply steel wire spiral high pressure rubber hose
Type R12-4 ply steel wire spiral medium pressure rubber hose in severe conditions
Type R13-multi-ply steel wire spiral high pressure rubber hose in severe conditions

Type R15-multi-ply steel wire spiral super high pressure rubber hose in severe conditions.
Structure: Rubber hose made of internal rubber layer, medium rubber layer, 4-ply or multiply alternate spiral steel wire strengthened layer and external rubber layer.