My grandson is always coming over to use my compressor, his bike tires are habitually low. I bought this pump so he would have one of his own that he can keep attached to his bike frame and be able to air up anytime.
This pump is small and light-weight, yet it works great. It is about 9 inches long and you pump it by sliding the inner and outer tube in and out. The gauge says 210 PSI, not sure of that but his bike only requires about 50 PSI so this will be perfect for his use. It includes a hose with both Presta and Schrade connectors, a mount for the bike, and a small patch kit.
Every bike needs one of these!