Topeak Mini Rocket LED iGlow Pump, Black Micro-sized mini pump with Integral Glow technology for added safety at night Transparent barrel houses an illuminated optical fiber element and transforms the pump body into an extra bright red safety light Mounts to seatpost or seat stay Presta valve only 160psi Two CR2032 batteries included; 6.8"X1.4"X.9" 2.36-Ounce