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 27.5" x 2.0-2.40" Presta valve stem Pre-filled with puncture stopping Slime tube sealant Prevents flats for upto 2 years