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. Features Improves performance of all MSR liquid-fuel stoves Glass-reinforced polymer material is lightweight and durable Great to have on hand as a spare for those just-in-case situations in the backcountry Now includes replacement windscreen For use with MSR WhisperLite(TM), WhisperLite Internationale(TM), WhisperLite Universal; SimmerLite(TM), and XGK(TM) stoves Technical Specs Best Use- Backpacking Weight- 2.3 ounces