uxcell 10 Pcs M5 Male Thread to 3.5mm Pneumatic Tube Hose Mini Barb Fittings Product Name : Barb Fitting;Fit Tube Outside Dia : 3.5mm /1.38" Male Thread Diameter : M5(5mm / 0.2");Overall Size : 12.5 x 7mm/0.5" x 0.27"(L*Max.D) Color : Silver Tone;Material : Metal Weight : 17g Package Content : 10 x Barb Fittings