3M™ Coupling Set 3/8" BSP Rectus 25 is our socket and plug coupling set for 3M™ Versaflo™ V-Series Supplied Air Regulators.For socket and plug hose coupling with 3M™ Versaflo™ V-Series Supplied Air Regulators, use 3M™ Coupling Set 3/8" BSP Rectus 25.Our coupling set CE approved.