✅ Inner tube 20 x 4.0 (4 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, you can have different product qualities: the inner tubes have extreme characteristics in terms of air tightness and elasticity and can be used for a wide range of tyre sizes. ✅ For Fat Bike Tyres, E Bike, Electric Bike, MTB Bike with 20 Inch FAT Wheels ✅For any information or clarification, prior to purchase, or for post-shipment issues (late delivery, defects or posthumous damage, etc.) please contact Seller Support with a message to the seller on Amazon
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