Lincoln-Style Couplers & Nipples for 1/4" ID, 250 psi maximum operating pressure. 1/4" NPT(f) inlet. Extra-long stem of nipple and coupler body assures long service life, easy connections under severe operating conditions. Maximum air flow 52 scfm at 100 psi. Length 21/2" (65mm); diameter 11/16" (37mm); weight 41/2" ounces (126g).