- Universal 28-mm Compatibility: This connector features a 28 mm inner diameter on both ends, making it compatible with water filters that have a 28 mm outer thread and standard plastic bottles. Perfect for direct drinking, backflushing, or creating gravity filtration systems while hiking or camping. - Superior Leak-proof Seal: Each two-piece adapter set includes 10 replacement seals to ensure a tight fit. This minimizes leaks, enhances filtration efficiency, and prepares you for outdoor adventures without worrying about lost or worn-out seals. - Versatile Outdoor Solutions: Ditch the bulky syringe! This connector allows you to connect filters to clean water bottles for quick backflushing, or pair it with threaded water bags to create hands-free gravity filtration systems. Easily access clean water when you need it. - Lightweight and Travel-Friendly: Weighing less than traditional syringes, this compact connector is ideal for long hikes, camping trips, and emergency situations. Its small size fits into any backpack, streamlining your gear without sacrificing functionality. - Practical Applications: Use this connector to quickly backflush your water filter after a long trek, ensuring you have fresh water ready to go. Set up a gravity filtration system at your campsite by connecting your filter to a water bag, simplifying your hydration needs. In emergency situations, it allows you to easily access clean water from any compatible bottle, ensuring you stay hydrated and safe.