uxcell 8mm 5/16" OD Air Pneumatic Tube Compression Fitting Coupling Coupler Product Name : Compression Fitting;Fit Tube(OD) : 8mm / 5/16"(0.315") Overall Size : 32.5 x 13.7 x 13.7mm / 1.3" x 0.54" x 0.54"(L*W*T);Color : Silver Tone Material : Metal & Brass Weight : 21g Package Content : 1 x Compression Fitting