1. High performance litter pad exclusive for Purobot Ultra AIPowered camera automatic cat litter box. Please Note: it is not suitable for PuraMax, PuraMax 2 and Purobot Pro Max cat litter box.2. PREVENT LEAKAGE: Urine will flow along the brim structure to the pad even if your cat urinates against the cylinder wall, eliminating any worries about leakage.3. WATERPROOF AND DURABLE: Made of highdensity 300D Oxford cloth with waterproof coating, it embodies the excellent performance of antistick, scratchresistant, and easy to clean.4. EFFORTLESS REPLACEMENT: Pinch the handle and pull it out to remove the litter pad. Two steps to install: (1) Clean the groove with a brush, insert the pad into the groove, aligning the top and bottom with the arrows. (2)Gently press and release; both sides will automatically spring back and insert into the groove.