This are bumper extension for Roomba.
My Roomba 772e continued to get stuck under the radiatos in my flat. So I designed those bumpers. I just glued them on the Roomba, but you can also drill some holes in the bumper of roomba and use screws.
If you need them higher or lower, just scale in Z direction (the stl is 15mm high, On the picture the prints are neary 20mm high (scaled by 1.25)).