Tube - Schrader 20"x1.75"/2.125" - Self Sealing (50)

Self-sealing tube can seal punctures up to 3mm in diameter without needing to add any additional sealant. Ideal for sealing against thorns, pins, screws, nails etc. Sealant contains fibres which force their way into the puncture to clog the hole. Simply remove anything sticking in the tyre and pump straight back up. Filler normally lasts for the life of your tyre.