uxcell 10Pcs Brass Pneumatic Valve Noise Absorb Muffler Silencer 1/4PT Thread Product Name : Pneumatic Muffler;Thread Size : 13mm/ 1/4PT Overall Size : 29 x 15mm/1.1" x 0.6"(L*Max.D);Material : Brass Color : Gold Tone Net Weight : 105g Package Content : 10 x Pneumatic Mufflers