The coolant path through the center of the fitting is optimized to maximize coolant Description: Machined from billet aluminum 6061 T6511 (not cast, not forged) Designed to maximize the resistance to breakage, so that it will not fail as the fitting does Aluminum coolant fitting is designed and manufactured to precise tolerances to fit the application with notable improvements in function, Weight: 0.22707612986 pounds, Manufacturer: KIXZSAZ