Smart T Air X share the same Refill Rings. With up to 25bags in each Ring, simply replace the Refill Ring aboutonce a month, and that’s it! Touch the button on yourSmart Bin and it will seal the trash bag for you- so youdon’t have to. Each Smart Bin T AlR X Refill Ring contains up to 25(4 gallon) durable trash bags. Smart Bin T AlR X Refill Rings and trash bags are moisture and water resistant. Smart Bin Bags: Large, durable, flexible & stronger.Perfect for your family’s monthly usage. Package contents: 6 official White Smart Bin T AIR XRefill Rings, up to 150 garbage bags. Smart Bin T AlR X Refill Rings are compatible withSmart Bin T AlR X Garbage can.