You are buying a brand new old stock RPM Alloy chainset featuring a Shimano Octalink fitting crank arms.
This is a Triple chainset with crank arm lengths of 175mm and chainrings 44/32/22
The chainrings are steal so very hard wearing (middle and outer feature pick up ramps)
Chainrings are 104 and 64 pcd and are of the 4 bolt design. They are 9 speed compatable.

Maybe worth buying this chainset for the rings alone as quality replacement rings are very expensive nowdays.

Please bear in mind this chainset will only fit onto a Shimano Octalink Bottom Bracket nobody else make a Octalink Bottom Bracket other than Shimano so although you may have a splinned bottom bracket please check that it is Shimano as other makes are not the same.