Built from high grade steel - Work hardens to over 80,000 PSI strength. Over 2 times the strength of any other steel bellhousing. Patent On 16 Points Of Bellhousing Design And Process Designed For Use Hydraulic Throwout Bearing Transmission Bore Diameter: 5.594 in. Transmission Height: 6.688 in. Weight 26 lbs. Grade 8 Fasteners Full Engine Plate Attributes: GTIN: 00084041031827 Brand Name: Quick Time Clutch Disc Diameter: 12.250 in. Clutch Operation: Hydraulic Color: Black Engine: Cummins Cummins Diesel Finish: Semi-Gloss Flywheel Tooth Quantity: 152 Item Height: 6.688 in. Material: Steel SFI Certification: 6.1 Transmission Bore Diameter: 5.594 in. Transmission Model: NV4500 WARNING CA Proposition 65: No Extended Information: Country of Origin: United States Emissions : Released Life Cycle Status: Available To Order Packing Information: Quantity of Each: Package UOM: Dimension: 22.1000 x 20.3000 x 8.6000 inches Weight: 36.2500 lb