Check the listing for details. 4 for $4.44 MSR Fuel Bottle Orings/seal gasket -- fits Stove Pump & Sigg types. Color: Black, Condition: New. Listed at 4.44 USD. FOUR O RINGS FOR 4.44 DOLLARS For the older 1 inch neck bottles, which need replacement O-rings (don't want them to crack when out backpacking). Works with bottle and whisper pump sealsSHIPPING FREE USA, International slightly moreNote: bottle and pump shown not includedHUGE MULTI PURCHASE DISCOUNT 20%-35% and SAVE!! FITS PRIMUS FUEL BOTTLES or MOST OTHER BOTTLES WITH 1 inch neck Note on O-Ring: Nitrile's compatibility with most environments. Nitrile (BUNA-N) 70 durometer, is a general purpose copolymer of butadiene and acrylonitrile. This compound has a relatively high acrylo content, making it exceptionally resistant to petroleum base oils and hydrocarbon fuels over a temperature range of -40°F to +250°F. Nitrile has good mechanical properties when compared with other elastomers and high wear resistance. Buy now, buy with confidence as track record and years with eBay show.FOUR O RINGS FOR 4.44 DOLLARS For the older 1 inch neck bottles, which need replacement O-rings (don't want them to crack when out backpacking). Works with bottle and whisper pump sealsSHIPPING FREE USA, International slightly moreNote: bottle and pump shown not includedHUGE MULTI PURCHASE DISCOUNT 20%-35% and SAVE!! FITS PRIMUS FUEL BOTTLES or MOST OTHER BOTTLES WITH 1 inch neck Note on O-Ring: Nitrile's compatibility with most environments. Nitrile (BUNA-N) 70 durometer, is a general purpose copolymer of butadiene and acrylonitrile. This compound has a relatively high acrylo content, making it exceptionally resistant to petroleum base oils and hydrocarbon fuels over a temperature range of -40°F to +250°F. Nitrile has good mechanical properties when compared with other elastomers and high wear resistance. Buy now, buy with confidence as track record and years with eBay show.