Uxcell a15081000ux0028 Car Turbo Sound Whistle Muffler Tip Whistler 31mm Package content: 1 x turbo sound whistler 1 x mini hex wrench; Color: silver tone Material: metal, aluminum; fit for tube inner dia.: 31mm/ 1.2 inches Fit for exhaust pipe thickness: 14mm/ 0.6 inches; screw diameter: 6mm/ 0.24 inches Whistler size: 80 x 41mm/ 3.1 x 1.6 inches); total length: 115mm/ 4.5 inches Fit tail pipe: 56mm-85mm; product name: turbo sound whistler