Slime STB-970019/10 Self-Sealing Smart Tube, Presta Valve (700 x 19-25mm) 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: 700 x 1925mm Designed to seal tread area punctures