Schwalbe AV6 Tube, 28/40-406

Schwalbe Standard tube Item 6. For bicycle tires in 20" inch (ETRTO 28/40-406). Retains air pressure considerably long. Due to the best material quality and constant wall thickness. Highest reliability. Proven millions of times.

Schraeder valve looks like a car tire valve. It may be bare or covered in rubber.