2 Pcs 1/2" PT Male Thread Pneumatic SC Exhaust Muffling Throttle Valve Product Name : Muffler Throttle Valve;Type : SC Male Thread Size : 1/2" PT;Thread Diameter : 20.5mm Adjustable End Thread Dia. : 10mm / 0.39";Overall Size : 47 x 24mm / 1.9" x 0.94" (L*Max.D) Main Material : Brass;Color : Gold Tone Net Weight : 137g;Package Content : 2 x Muffler Throtle Valve