Medium Bike Cogs

These are reclaimed bike cogs, cleaned and degreased at Steel Web Headquarters. They're all unique with individual wear patterns and aging.
Medium Cogs are 7cm to 10cm M1 - 7.9cm diameter, 2mm thick M2 - 7.4cm diameter, 2mm thick M3 - 8.5cm diameter, 2mm thick M4 - 8cm diameter, 2mm thick M5 - 7.9cm diameter, 2mm thick