Bogaedo

Hello everyone, For my project I am looking for a strong hard as well even little elastic filament that provides grip like rubber on a metal surface. I am trying to make a cnc suction cup that slides over a metal beam. The cup which is sucked through itself and get clamped by the expanding beam when enabled is yet to slippery if printed with abs. I thought of using PP but I dont know if that is grippy and I also consider using two different kinds of filaments in parts that later can be combined together by glue. Below some pictures of the cup. Can anyone help me out? Thanks and best regards, Bogaedo