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