Slime STB-970028/10 Self-Sealing Smart Tube, Presta Valve (700 x 28-35mm) 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: Presta 48mm Fits tire sizes: 700mm x 2835mm Designed to seal tread area punctures