Stronglight Dural chainrings are mads from 5083 Aluminium alloy.
Available in 110mm and 130mm BCD in black or silver. The chainrings are 9/10 speed compatible and will work fine with Shimano, Campagnolo or SRAM drive trains. You can even run 11 speed chains on the as chainset are dumb they dont know whats going on.
This is an inner ring listing