MSR Expedition Service Kit - WL/WLI/WLU ProStretch meaning that the bladder should

meaning that the bladder should be placed vertically for optimal flow

Integrated whistle adds piece of mind

but with 4 lobes that are sandblasted for better holding power

sleeve length 22"

MSR Expedition Service Kit - WL/WLI/WLU ProStretch meaning that the bladder shouldAn extended trip far away from home is no place to remember you forgot to replace that worn out O ring. But it happens. Be prepared for anything with MSR's Expedition Service kits. They provide comprehensive maintenance and repair solutions for your liquid fuel stove and pump in places where failure is not an option. This kit includes the necessary components for servicing MSR's WhisperLite, WhisperLite Universal, or WhisperLite International stoves.