Quick coupling NW 7.2 with internal thread Design: Made of brass, with oil- and heat-resistant NBR seals. Shut-off on one side, self-sealing when coupled. In addition, it prevents contamination of internal parts by the closed locking sleeve. When using steel nipples, this coupling can also be used for compressed air tools thanks to the hardened locking rods. Maximum operating pressure: 35 bar, max. static operating pressure (without pulsation).