Flex-a-lite 3953 Heavy Duty Engine Oil Cooler Kit Overall dimensions of 7" x 21" x 1 1/2" Easy to follow instructions with complete hardware, hose and fittings for complete installation Billet aluminum fittings offer more secure host connections Features 1/2" barb with a tube diameter of 5/8" for proper fit Designed for filters with 3/4", 13/16", 18mm, 20mm, or 22mm threads