Standard Pump: For use with MSR WhisperLite, WhisperLite Internationale,SimmerLite,and XGK Stoves. This is the lightest, most reliable pump on the market, redesigned to improve the performance of all MSR liquid-fuel stoves. It offers unmatched durability, easier field maintenance, and superior flame control for more cooking options than ever. DragonFly Pump:For use with MSR DragonFly Stove. This is the lightest, most reliable pump on the market, redesigned to be easier than ever to use, with full field-maintainability. It also offers unmatched durability as well as an auto-shutoff valve for increased safety.