This inner tube cannot be inflated a lot when it is not installed in the outer tire, otherwise it will cause irreversible damage installation, inflate slightly to check for air leakage When installing, first inflate 0.5PSL, make that the inner tube is to the inner wall of the tire when inflating, and then press and adjust the inner tube. Features: Small size, light weight, good toughness, cost-effective Size : 700 x 18 23 25 28 30 32C Recommended scope of application Weight:36g Valve length French 45mm Material: TPU colour: red Package Contents: 1 x Super Light Bicycle Inner Tube Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.