Exclusive Design for PETKIT Litter Boxes: The for PETKIT N50 2.0 Odor Eliminator is specifically designed for use with for PETKIT PuraMax, for PuraMax 2, and for Purobot Max Pro self-cleaning cat litter boxes. Note: For PuraMax installation, remove the silicone cover from the waste bin lid. Not compatible with for Purobot Ultra. Enhanced User-Friendly Case: Featuring a newly updated plastic case, the N50 2.0 ensures a clean and hassle-free replacement process, significantly enhancing user experience by keeping your hands clean and making maintenance effortless. Quantity:6PCS/3PCS Colour:As Shown Material:plastic Package Contents: 6 * Cat Odor Removers / 3 * Cat Odor Removers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.