Slime Self-Sealing Tube - 26 These are no ordinary bicycle tubes! These extra strong inner tubes stop flats for 2 years because there is Slime inside. No more flats for 2 years! Extra strong because theres Slime inside Instantly seals tread area punctures up to 1/8?Ç? (3mm) in size Seals multiple punctures repeatedly Non-toxic and non-flammable Cleans up with water Works in bicycles, wheelbarrows, wheelchairs, jogging strollers, snow blowers and much more. Stop flats for 2 years!