Interstate Pneumatics CA465B 1/4" Automotive Coupler 3/8" Easy-Lock (Brass) 1/4 inch Automotive Brass Coupler x 3/8 inch Easy-Lock Barb: 3/8 inch Easy-Lock Temperature: -40 degree F to 212 degree F Seals: Buna-N (Nitrile) Ball Bearing: Quantity 6, stainless steel