No ordinary bicycle tube, the extra strong Slime Tube has Slime sealant inside to instantly seal tread area punctures up to 3mm in size. The tube can seal multiple punctures repeatedly with a non-toxic and non-flammable material.Extra strong with Slime sealant insideInstantly seals tread area punctures up to 1/8ӟ (3mm) in sizeSeals multiple punctures repeatedlyNon-toxic and non-flammableCleans up with water700 x 19-25mmPresta valve stemPre-filled with puncture stopping Slime tube sealant