1 inner tube 20 x 4.0 /4.9 x bicycle wheel electric bike and bicycle

✅inner tube 20 x 4.0 / 4.9 (2 pieces)
✅schrader valve (american)
✅The inner tube is puncture-resistant, made of butyl, a type of synthetic rubber that is very elastic and at the same time airtight. Depending on the compounds used, different product qualities can be obtained: the inner tubes have extreme characteristics in terms of airtightness and elasticity and can be used for a wide range of tire sizes.
✅for fat bike tires, e bike, electric bike, mtb bike with 20 inch fat wheels