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. Before you replace your failing pump make sure you have tried yearly maintenance, using the maintenance kit. That said, on longer trips it&';s good peace of mind to have an extra pump in the bag. WARNING: Contains brass that can expose you to lead, a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm.