McMaster 4629K72 Brass Body On Off Valve with Lever Handle, Lockable, 3 NPT Female, 450 psi G2856271 3 4" Drive Ratchets Number of 3 4" Drive Ratchets Number of Pieces 1 Output Drive Type Male Square Drive Type Hand Material Alloy Steel Impact Rated No Locking No Number of Points 4 Measurement Type SAE Output Drive Shape Square Non Magnetic No Non Sparking No Input Drive Gender Female Output Drive Gender Male Input Drive Shape Square Insulated No Corrosion Resistant Yes Rugged Comfort 6500 Series Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet temperature