Wingsmoto 2 Pack of 200 x 50 (8"x 2") Butyl Rubber Inner Tube with Angled Stem for Razor e100 e200 Schwinn Mongoose Bladeze
[Product Information]
This inner tube is made of isobutylene isoprene rubber, which is much better in air tightness, elastic damping and durability than natural rubber ones.
Size: 200mm x 50mm, means that the tube is 200mm x 50mm, and in inches is 8" x 2"