Rubber Duct Cable Cord Cover Black 10ft by WireRun

We wanted to use this item for concealing power cords in our tradeshow booth. However, the problem was that it came rolled up in a box and no matter what we did, we couldn't get it to lay flat. We laid it flat in our hall with weight on it for a few weeks and it just kept curling up. So, we tossed it out.