Schwalbe Tube AV4. Reliable, high quality and very air tight inner tubes from Germany's number one manufacturer. All valves are nickel plated and valve inserts are replaceable. Sized for Brompton folding bicycles. Fits ALL tires that are compatible with your Brommie.

Fits all of the following size tires:

(37-340) 16 x 1-3/8"
(28-349) 16 x 1.10"
(35-349) 16 x 1.35"
(37-349) 16 x 1.40"
(28-355) 18 x 1.10"
(35-355) 18 x 1.35" 

VALVE: Schrader
WEIGHT: 85 grams
STEM LENGTH: 40mm