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2-Pcs 20″ Bike Tubes 20×1.75/2.125 AV32mm Schrader Valve 20″ Bicycle Tubes Compatible with 20 x 1.75 20 x 1.90 20 x 1.95 20 x 2.0 20 x 2.10 20 x 2.125 Tire Tubes

High Quality The bike tube is made from premium butyl rubber.It has the advantages of good sealing performance, ozone resistance, aging resistance, shock absorption, electrical insulation.