Zefal hpx classic alu pump the hpx spring locking system to fit any frame without the need for straps or secondary fixings ensures its capable of pumping up features barrelaluminium connectionreversible prestaschrader handlealuminium length4 sizes available mountingframe fit pressure12 bar147 psi thumblockaluminium stemaluminium weight240g size3 buy zefal accessories from chain reaction cycles the worlds largest online bike store