KEE 054 Series 12mm Hose Tail Coupling - 054CVHT13BNN Body: Brass (MS 58) Nickel Plated Valve Body: Steel Hardened, Nickel Plated Sleeve: Steel Hardened, Nickel Plated Spring and Locking Ring: Stainless Steel 301 Locking Balls: Stainless Steel 301 Seals: NBR Interchangeable with the Rectus 17 Series & Standard Schrader NW5. General purpose pneumatic coupling for garages and workshops with above average flow performance for liquid and gaseous media