Magnetic Dustproof Curtain: Exclusive for PETKIT PuraMax 2/PUROBOT Max Pro self-cleaning cat litter box. The curtain fits the size of the entrance of the litter box, but does not affect the infrared sensors and security system. Keep Clean and Odor-Free: The curtain is seamlessly closed to avoid the scattering of kitty litter and isolate dust, effectively prevent odor overflow. Easy To Use: You juat need insert both sides of the curtain into the entrance groove, then slide it up, until you hear a "click" sound, and it is successful. Warm Tips: When used in conjunction with the PURA MAX fence, the excess can be cut off along the dotted line. PETKIT Magnetic Dustproof Curtain 2.0 for PURAMAX 2/PUROBOT MAX PRO Automatic Cat Litter Box