YunSCM 4-pack 47/57-406 20 inch tube 20x1.75 20x1.95 20x2.0 20x2.10 20x2.125 AV32mm valve compatible with 20 inch bike tube/kids bike/electric bike tube 20x1.75/1.95/2.10/2.125

["Product Specification: Compatible with 20 tube 20x1.75 20x1.90 20x1.95 20x2.0 20x2.1 20x2.125 bicycle tube, with a length of AV32mm, suitable for road bikes, city bikes, mountain bikes, off-road bikes, bikes with 20-inch tires and more," "【High Quality】 The bike tube is made of high quality butyl rubber. It has the advantages of good sealing performance, ozone resistance, aging resistance, shock absorption, and electrical insulation." "【Easy Installation】 Installation is quick and easy. Please follow the inflation instructions when deflating a flat tire. Save time and effort, replace the old tube in a few minutes." "【Important Note】 When changing a bike tube, be sure to add some air before installation. This gives it shape so it does not twist or bunch up, which can lead to pinching. Check for a consistent bead of the tire to the rim on both sides." "【Convenient and Safe】 After replacing the butyl rubber tube, it absorbs impact on uneven road surfaces and makes riding more comfortable and safe."]