Usage Tips: Upgrade: The water filter features an additional layer of rubber seal to help prevent unfiltered water from leaking. The filter housing is made of environmentally friendly, food-grade plastic that is BPA-free for safe filtration. Multi-layer Filtration: These water purifiers include a multi-layer filtration system with activated carbon and an ion exchange resin to help reduce odors. The filter contains 30% more ion exchange resin than many other brands (the yellow substance visible inside is the resin), which helps reduce TDS and remove ions such as calcium, magnesium, and chlorine from water. Note: Filtration performance may vary depending on local water conditions. Protect the Environment: Each replacement filter can filter approximately 40 gallons of water, helping reduce the use of single-use plastic bottles and supporting environmental conservation. Replacement Models: Compatible with Zero Water pitchers models ZR-001, ZR-003, ZR-004, ZR-006, ZR-008, ZR-012, ZR-017, ZR-600, ZP-007RP, ZD-013W, ZD-013D, ZR-0810G, ZR-0810-4, ZP-010, ZD-010RP, ZS-011RP, ZD-012RP, ZD-20RP, ZD-018, ZD-030RP, ZJ-003, ZJ-004S, ZP-006-4, ZBD-040-1. For best results, replace the filter monthly. When the filtered water develops an off-taste or sour flavor, it is time to replace the filter. Color: White Material: Plastic + Resin Package Contents: 1 x Water Filter Note: Light reflection and differences in display screens may cause slight variations between the color shown and the actual product. Measurement may vary by +/- 1-3 cm.