Shimano Ultegra R8000 crankset with left arm powermeter. Works great and is ANT+ compatible with all major bike computer brands. 50/34 chainrings and 172.5mm crankarm length. 2 small scratches on the outside of the left crankarm but otherwise looks and works like brand-new. I have raced 1 season on this powermeter and it has worked great. l am selling as l want to upgrade to dual-sided. Please note that this powermeter is not Bluetooth compatible.