Ensure your Sawyer water filter is working optimally with this set of six replacement gaskets/O-rings, compatible with the following water filtration systems: MINI, Squeeze (including All-in-One), and the Micro Squeeze. Gaskets can get warped or worn out over time or damaged from over-tightening, leading to a poor seal that can diminish flow rate or cause leakage. Made of BPA-free, food-grade plastic, these gaskets are ideal for updating loose, leaky, moldy, and worn gaskets. Keep these replacements on hand when travelling, camping, hiking, and backpacking. Each gasket measures 0.985 inches in diameter (with a 0.59-inch inner diameter) and 0.125 inches high. Package includes six replacement gaskets. Sawyer Products has offered the best, most technologically advanced solutions for protection against sun, bugs, water, and injuries – everything from first aid kits developed for wilderness to point-of-use water filters that filter contaminated water to levels cleaner than U. S. bottled water.