Slime 30045 Self-Sealing Smart Tube, Schrader Valve (26 x 1.75-2.125") Pre-installed with Slime Sealant to provide maximum puncture protection and prevent flat tires on your bike Instantly and repeatedly seals tire punctures for up to 2 years Valve type: Schrader Fits tire sizes: 26 x 1.752.125 Designed to seal tread area punctures