uxcell 2 x 1/4" PT Thread Sintered Pneumatic Air Exhaust Silencer Muffler Product Name : Pneumatic Muffler;Thread Size : 1/4" PT Overall Size : 28 x 15mm/ 1.1" x 0.59"(L*Max.D);Material : Brass Color : Gold Tone Net Weight : 22g Package Content : 2 x Pneumatic Muffler