Gebhardt Cyclocross Chainring. 130pcd, typically used on older(non compact) Shimano and SRAM chainsets, They work with most 9/10 speed systems.
Gebhardt chainrings are manufactured with high precision using material ALU DURAL (DIN 1725) with a thickness of 3.5mm. The teeth type, form and production technology provide low abrasion and a long life time.
Please note : images only depict silver or black design and not the specific number of teeth on the chainring.