Check the listing for details. Replacement gel caps for gu ultimate fuelbelt flask push-pull 33mm size 4pc. Condition: New. Listed at 3.00 USD. Replacement push-pull Gel Flask caps, set of 4. What to do when you gel flask caps become disgustingly encrusted with dried gel and mold? Just replace them with these new high-quality push-pull closures. These American made caps are used as replacements for many of the common gel and water flasks on the market. This will fit the gel flasks sold by Ultimate Directions®, Lava belt, TNi and Fuelbelt®, which have a diameter of 33mm (1.3") measured on the outside of the threads. We also sell complete gel flasks with this cap if you check our other listings. We don't carry the dust caps which go over these caps, but they can be found in many triathlon shops. Size: 1.4" wide x 1.2" high (35x30 mm), weight for all four is about .72 oz. (20 gm.), shipping weight is 3 oz. These are brand new items. No flask is included!!! See my other auctions for other unique items. Buyer pays calculated shipping based on postal code. You can combine shipping with other items and usually the highest shipping is enough to pay for everything, but ask before making ONE paypal payment! Click on pictures below for enlarged version (in new window) (Flask NOT included!!!) The cap will fit these style bottles (not included)