Our Heavy Duty Vacuum hose is made of high quality silicone, features a glossy finish and smooth inner diameter and will not collapse or degrade over time from heat due to additional wall thickness. The silicone vacuum hose has a 4mm inner diameter and 5mm (2.5mm per wall) total wall thickness and comes in Black. Vacuum hose is priced and sold by the foot; if you need 5 feet, purchase quantity of 5 during checkout.