Features: Experiences seamlessly compatibility and leak proof performances with our 28mm water filter couplers, for weight filtrations and standard plastic water bottles during outdoor. Consist of durability silicones and features 10 replaceable gaskets, this adapters set ensures a secure, sealing connection for efficient water filtrations in bad environment. Perfect for campers, and survivalist needing light weight gear to purifies water during multiple day treks or emergency situations. Transform threads water bags or bottles into instants filtrations stations for backflushing filters, or cleaning water access at basecamps and trailsides. Streamlines your pack with this coupling solution that replaces enormous syringes while maintaining consistent water pressure for faster purifications. Specifications: Color:Two Elections Dimension:5x6.35cm/2.5x1.97inch Component:Silicones Package Includes: 1Set water filters couplers note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.