Slime Smart Tube Schrader Valve Bicycle Tube (24" X 1.75 to 2.125), 2 Pack Slime Smart Tubes instantly and repeatedly seal punctures before they ruin your ride Instantly Seals Punctures up to 1/8" (3mm) using FibroSeal Technology Non-toxic, Non-corrosive and Cleans up with Water Installs Like Standard Inner Tube Factory filled with Slime tube sealant, Smart Tubes install like a standard tube, while offering the powerful protection of Slime