So the roles are loud and don't fit, they rattle LOUD. The edges look like they've been chewed on by a dog after a few uses, although they seem to sit right in the Roomba compartment for them, they're clearly not the right size. There are also NO SCREWS on the side brushes to install them. These are just parts you can't attach, others I bought came with screws. One day I got some of these super small screws. Brushes fell out not once, but twice. 2 separate brushes literally just unscrewed and flew away while the machine was running. Do not buy these parts they are cheap for some reason and I sincerely believe they damaged my Roomba even though it claims to fit my type. Automobile. DO NOT BUY!