General description The 1' Aluminum Mechanical Fan Spacer Kit is designed for GM, Chevy, Ford, SBC, and BBC engines. This kit includes a 1-inch machined aluminum alloy fan spacer that is compatible with both short and long water pumps, making it versatile for various fan installations. Technical specifications Material: Aluminum Alloy Color: Silver Spacer Thickness: 1 inch Measurement Tolerance: +/- 1-3 cm Compatibility and accessories Compatible with short or long water pumps Includes 1 mechanical fan spacer Includes necessary accessories