Aluminum

This is a vintage Topline Grafton crankset. 170mm crank arms. Square taper. 130 BCD. Silver. Comes with 56T Sugino chainring and 44T Shimano small ring. There is an offset drilling mark where whoever donated them to us drilled for the pedal spindle on the drive side (pictured). I do not believe it affects the integrity of the crank arm. Other than that, this crankset is good to go and is very lightweight. No returns or exchanges. These are being sold to raise funds for Pedal it Forward. PIF is a local nonprofit that repairs and distributes roughly 3,500 bikes per year to those in need in our community.