Schwalbe SV7 Tube, 40/62-406

Schwalbe Standard tube Item 7. For bicylce tires in 20" inch (ETRTO 40/62-406). Retains air pressure considerably long. Due to the best material quality and constant wall thickness. Highest reliability. Proven millions of times.

Presta valve is the long, skinny valve that you have to unscrew to open.