The Nishiki(R) Schrader Valve 20" 3.5-4.0 Bike Tube allows you to replace your flat or worn out bike tube fast and easily. This bike tube is designed to fit 20" tires with a width range of 3.5-4.0 and features a Schrader valve that is 35mm in length. Ride confidently on the roads with the Nishiki(R) Schrader Valve 20" 3.5-4.0 Bike Tube. Features: Replacement bike tube Ideal for fat tires Fits 20" tires with a width range of 3.5-4.0 Valve type: Schrader Valve length: 35mm