Push-to-connect design, no need to retract the sleeve to connect. Locking sleeve prevents accidental disconnection during operation. U.S.A. Fitting Size (in.): 5/8 M x 7/8–14 UNF NPT, Max. PSI: 5,000, Locking Sleeve: Yes 4-to-1 safety factor Minimal spillage upon disconnection No-air inclusion upon connection Directly interchangeable with Parker, Faster, Holmbury and Safeway A push-on &Quot;toilet seat&Quot; style dust protector (sold separately) for the coupler side helps keep contaminants from entering the hydraulic system Manufactured to ISO 16028 specifications