100% Quality Guarantee: Meets NSF Standard 42 Certified, FDA, BPA-Free Material. Universal Standard Size: Membrane Solutions grooved sediment water filter cartridges are 10"(L) x 2-1/2"(OD) x 1-1/10"(ID), fit any standard 10-inch x 2.5-inch Whole House or under-sink Reverse Osmosis water filtration system. Greater Dirt Holding Capacity: These sediment cartridges feature multi-layer gradient density and deep grooved design, making it 3 times the dirt-holding capacity of standard 10-inch sediment cartridges, bringing a longer life-cycle and saving replacement cost. High-Quality Filtration: Food-grade material meets 100% pure polypropylene microfibers with NSF certification, this grooved sediment water filter ensures the quality of your drinking water. Triple Stage Density: The 5-Monron whole-house water filter is designed with a perfectly balanced density featuring three PP layers to remove most sediment, dirt, rust, and particles. Higher particle reduction efficiency as the pre-filters in home and commercial water purified systems.