Stages 105 R5800 Gen 3 Left Crank Power Meter 165mm
It's compatible with 10, 11 and 12 speed Shimano 105, Ultegra and Dura Ace cranks. There's a small piece of helicopter tape on the front edge. A bit of heel rub made it through the sticker which you can see in 1 spot undet rhe "0" of "105".