This Spectre breather filter, also known as a crankcase vent filter, has a flange with an inside diameter of 10mm. By using the included adjustable worm gear clamp, this air filter will fit tubes with outside diameters from 3/8 inch to 1/2 inch (8-12mm). This Spectre breather uses stainless steel mesh as its filter mdeia, it features a triple chrome-plated steel top and base, and it comes factory pre-oiled and ready to use. Product Features:Triple chrome-plated steel top and baseMade with stainless steel mesh10 mm flange inside diameterIncludes a stainless steel adjustable clampFits 3/8 inch to 1/2 inch (8-12mm) tubes
