AMRS-309310001 * Sealand Marine Holding Tank Replacement Filter- 5/8" 309310001 The innovative concave shape of the SeaLand ECO filter assures that malodorous gases are completely filtered through activated odor-adsorbing media. The result is more thorough odor elimination and the assurance of more enjoyable boating. Though differently shaped, it is a direct replacement for previous SeaLand and Dometic vent filters, as it fits the same installation brackets as older models. Now made with recyclable plastics, SeaLand ECO filter components are much more ecologically friendly than previous SeaLand filters, as well as many other current filters. Improved malodorous gas filtration. New filter cartridge uses 55% less plastic than previous SeaLand vent filter cartridge. Fits in the same space and brackets as previous SeaLand vent filters for easy change-over One replacement cartridge fits all SeaLand ECO filter sizes. Earth-friendly, recyclable plastic components Complete kit includes fittings for popular vent hose ID sizes: 5/8 in., 3/4 in., 1 in., and 1-1/2 in. (16mm, 19mm, 25mm, and 38mm)