- Premium Seam Sealed Butyl Rubber Tube
- Fits tires marked 20x3.50 to 20x4.0
- ISO Diameter: 406
- 35mm Schrader valve
- Removable core
**Special return policy for inner tubes** Tubes can only be returned because of a manufacture's defect – separation of a bond at a seam or valve joint. A tube can not be returned due to a puncture, improper installation or tearing at the valve joint.