Genuine Hydro-Gear replacement part. New, Bulk Packed. Genuine OEM Hydro-Gear Replacement Part. Consult owners manual for proper part number identification and proper installation. Please refer to list for compatibility. Includes (2) 70331 Cylinder Blocks. New, Bulk Packed. Genuine OEM Hydro-Gear Replacement Part. Consult owners manual for proper part number identification and proper installation.