Purchased for the TriStar DXL. They fit perfectly, with a tight, clean closure when the lid is closed. Carpet cleaning was a bit delayed and I'm not proud to have filled two bags in a very short time. There was no sign of dust or bad odors in the air during the cleaning, so these bags, along with the vacuum filters, did a great job of trapping dust, Arm and Hammer Pet baking soda, dog hair and dander. there were three bags of twelve in this order 36.