Supreme high quality silicone hose kit. Dress up your bland stock hose. This is a set of four (4) 3 meter sections of hose. Inner diameter for first hose is 4MM (3/20"). Outer diameter is 8MM (8/25"). Inner diameter for second hose is 6MM (1/4"). Outer diameter is 10MM (2/5). Inner diameter of the third hose is 8MM (8/25"). Outer diameter is 14MM (5/9). Inner diameter of the fourth hose is 12MM (18/25"). Outer diameter is 18MM (7/10). Maximized for resistance to heat and corrosion. Not to be used with fluids, intended for vacuum hose. These are not to be used with fluids. Intended for vacuum hoses. Don't forget to check out our other listings for parts and accessories to suit your ride. We are always expanding so keep an eye out for more supreme quality products from Sickspeed. Purchase includes a die-cut vinyl decal: Check out the manufacturer's website for more info and pics.