TheSlime Smart Tube. A standard inner tubes, that comes pre-filled with Slime Sealant.Slime Smart Tube FeaturesInstantly seals up to 1/8" (3mm) puncturesProvides flat tire protection for up to 2 yearsPre-filled with environmentally-friendly Slime tube sealantSchrader Valve
Best Price: £9.99 from Leisure Lakes Bikes