uxcell 2pcs 13mm 1/4PT Male Thread Pneumatic Noise Muffler Silencer PSL-02 Product Name : Pneumatic Muffler;Type : PSL-02 Male Thread Diameter : 13mm/ 1/4PT;Overall Size(Each) : 40 x 15mm/1.6" x 0.6"(L*Max.D) Material : Plastic;Main Color : Blue, White Net Weight : 8g Package Content : 2 x Pneumatic Silencer Muffler