This is a lightly used Shimano 105 FC-5750 Hollowtech II crankset.
The arms are 172.5mm long and it is for 10 speed drivetrains. This is the compact version, fitted with 110mm BCD 50 and 34 tooth chainrings.
The crank is used and has some heel rub and a few small scratches. It is in otherwise good condition. All threads and splines are 100% and there is loads of life in the rings.
Here's the full description from Shimano:
Lightweight HollowTech II 105 10-speed chainset. Slim body line & smooth rotation. Optimum balance of light weight & stiffness. Front index is superior shifting performance.
Thanks very much for looking. Please check out my ebay shop for loads more bike stuff.