4 Pcs M5 Thread to 6mm Tube Air Pneumatic Quick Fitting Pipe Connector Product Name : Quick Coupler;Male Thread : M5 Male Thread Length : 4mm;Fit Tube OD : 6mm Overall Size : 21.5 x 13mm/0.85" x 0.5"(H*Max.D);Color : Brass Tone, Blue Material : Brass;Net Weight : 21g Package Content : 4 x Quick Coupler