Precise compatibility with 1812/2012 reverse osmosis membrane sizes, suitable for 24-150 GPD RO membrane elements commonly used in under-sink and household RO water filtration systems. Complete replacement kit includes RO membrane housing, elbow fittings, housing wrench, and check valve for a one-stop solution for repairing or upgrading your existing reverse osmosis system. Durable and leak-resistant design with a sturdy housing body and tight-sealing elbow fittings. Integrated check valve minimizes leaks and ensures stable water pressure performance. Extends the lifespan of your RO membrane and system components by providing reliable performance. Replacement filter housing designed for 1812/2012 reverse osmosis membrane sizes, compatible with 24-150 GPD (gallons per day) RO membrane elements commonly used in under-sink and household RO water filtration systems. Complete replacement kit includes RO membrane housing, elbow fittings, housing wrench, and check valve to provide a one-stop solution for repairing or upgrading your existing reverse osmosis system without purchasing extra small parts separately. Durable and leak-resistant design: The sturdy housing body combined with tight-sealing elbow fittings and integrated check valve helps minimize leaks and ensures stable water pressure performance, extending the lifespan of your RO membrane and system components. Color: White Material: plastic Package Contents: 1 set Reverse Osmosis Filter case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.