Traxxas Air Filter Housing for the 2.5 Revo. This attaches to the throat of the carburetor. Black plastic air filter housing with cover screen and changeable element. Rubber double angled neck for filter. Zip tie for fastening INCLUDED: One screened filter One rubber double angled One rubber adapter One zip tie Diameter: 1.5 (39mm) Height: 2.4" (60mm) Diameter of carb adapter: 0.53" (13.5mm) Length of zip tie: 7" (177.8mm)