Prompt weight savings: using Tubo-Folding Bike i can make folding bikes instantly lighter, so they can be carried along easier. Due to the processing of new materials the production of Tubo-Folding Bike needs much fewer water and emits less CO2 as the production of tubes made of rubber or latex. This makes Tubo-Folding Bike a very ecofriendly inner tube. Suitable for 16″, 18″ and 20″ folding bicycles like Brompton, Vello, Dahon and Birdy.Specifications:- Size: 20 - Weight: 53 g- Width: 1.2 – 1.8- Valve: 40MM