Item: mi xim bicycle inner tube BMX folding bike inner tire. Body material: butyl rubber. 1 X Bike Inner Tube. Gas nozzle type: Schrader Valve. Schrader Valve, and equipped with air nozzle cap. Size: about 12 2.125, 16 1.35-1.5, 20 1.75-2.125, 26 1.95-2.125.