Upgrade: This water filter features an additional rubber seal layer to prevent unfiltered water from leaking. The filter housing is made of environmentally friendly, food-grade plastic for safe and reliable filtration. Multi-layer Filtration: Our water purifier uses a multi-layer filtration system with activated carbon and an ion exchange resin to reduce odors and impurities. It contains 30% more ion exchange resin than standard filters (the yellow substance visible inside is the resin), which helps reduce TDS and removes calcium, magnesium, chlorine, and other ions from water. Note: Filtration performance may vary depending on your local water conditions. Environmental Protection: Each filter can purify up to approximately 150 liters (40 gallons) of water, helping reduce single-use plastic bottle consumption and supporting environmental sustainability. Replacement Compatibility: These replacement filters are compatible with Zero Water pitcher 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, and ZBD-040-1. For optimal performance and best taste, we recommend replacing the filter every month. 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: 3 x Water Filters (only the items listed are included; other accessories not included) Note: Lighting and display settings may cause slight color variations between the product image and the actual item. Measurement tolerances may vary by +/- 13 cm.