CUSTOM FIT: KropBom waste liners are crafted for a perfect fit in litter box robot waste drawer. Compatible with Litter Box Robot 4, Litter Box Robot 3 (with and without connect) SUPER THICK AND DURABLE: Constructed from LDPE material, these disposable litter box liner bags are both non-toxic and odorless. Providing exceptional strength, tear resistance, waterproof. Get rid of cat waste easily and quickly with these cat litter bags 9-11 GALLONS OF CAPACITY: Generously sized at 25" * 23", these litter bags offer a larger capacity of 9-11 gallons. Ideal for multi-cat households and busy cat owners. Clean out the cat litter box drawer effortlessly and hygienically, avoiding any mess or dust EASY-TO-USE: For Litter Box Robot 4, you just need to fold the edges of the liner over the rim of the waste drawer. As for Litter Box Robot 3, insert the rolled edges of the liner into each of the four tabs located in the waste drawer. Receive alerts on the robot app when the waste drawer reaches its capacity. Simply take out the liner from the waste drawer, dispose of it, and replace it with a fresh one VALUE-PACKED DEAL: Package includes one 60-count rolls, along with 1 cat toy. We recommend changing the waste drawer liner twice per week for two average-sized cats to maintain cleanliness and control odors.