The EcoAqua Replacement Filter is designed to be compatible with Aqua-Pure AP517, AP500, and AP510 models, providing a perfect fit for your under-sink water filtration system. With approximate dimensions of 9-9/16" L x 3-3/16" Diameter, it fits seamlessly into your existing setup. This 3-pack filter boasts a 2,000-gallon capacity, ensuring a dependable and long-lasting performance. The filter is designed for purity and does not impart taste, odor, or color to the liquid being filtered, offering 5 micron nominal filtration. For optimal results, change the filter every 6 months, depending on local water quality. Made from durable polyethylene material, this product is certified by ANSI and NSF, guaranteeing its high standards. Each pack contains 3 filters, offering great value for your money.