A large, self-sealing inner tube that will keep you rolling even when the rough ground attacks your tyres. The tubes come filled with Slime sealant, which can instantly seal multiple puncture points simultaneously. Head out without your puncture repair kit and let the tubes do all the work.Pre-filled with puncture-stopping Slime sealantPresta valve stemSeals multiple puncture points at the same time - up to 3mm in sizeCan be easily cleaned with waterNon-toxic, non-flammableDimensions: 700mm x 28-35mm