uxcell&reg; Car Turbo Sound Whistler Muffler Exhaust Pipe Blow Off Valve 35mm UXCELL (U excel !) is the sole authorized Seller of uxcell products Producte Name : Turbo Sound Whistler;Material : Metal, Aluminum; Screw Diameter : 6mm/ 0.24";Whistler Size : 83 x 35mm/ 3.3" x 1.4" (L*W); Total Length : 115mm/ 3.9";Color : Silver Tone; Fit for Tube Inner; Dia. : 35mm/ 1.4";Fit for Exhaust Pipe Thickness : 12.7mm/ 1/2" Weight : 112g;Package Content : 1 x Turbo Sound Whistler,1 x Mini Hex Wrench + Screw