SCHWALBE AV 2 Tube (New Logo)

From German tire manufacturer SCHWALBE,

a butyl tube that boasts excellent airtightness and durability.

With excellent stretch, a wide range of sizes, and an extensive lineup, they are compatible with all tire sizes.
Additionally, the valve cores can be removed on all types—British, American, and French—making it easy to add sealant or puncture-prevention agents.