Espresso Strap is a universal adapter to securely fasten cylindrical objects (pumps, CO2 cartridges, inflate & repair canisters…) to a bicycle frame, stem or seatpost.Designed for our Espresso or Espresso Doppio.Key features:Feather weight: totally reliable clamping at a ridiculous 20g,Universal: allows to secure Espresso (both standard 75ml and Doppio) to the bicycle, independently from frame/tubes shapes and sizes.,Safe: thanks to the soft rubber element and to the strong velcro strap, unwanted cartridge release are simply impossible..