Slime Super Thick PV Smart Tubes Extra thick tube pre-installed with Slime Sealant to provide maximum puncture protection and prevent flat tires Instantly and repeatedly seals tire punctures for up to 2 years Valve type: Presta Fits tires: 26" x 1.7 -2.125" Designed to seal tread area punctures up to 1/8 (3mm) in size