Slime Inner Tube 16 In. Pre-Filled With Tire Sealant 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 with Slime sealant inside Instantly seals tread area punctures up to 1/8″ (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. Pack may vary