These are reclaimed bike cogs, cleaned and degreased at Steel Web Headquarters. They're all unique with individual wear patterns and aging.
Large Cogs are anything over 10cm, sizes listed below
L1- 13cm diameter; 2mm thick
L2- 14cm diameter; 2mm thick
L3- 13.9cm diameter; 2mm thick
L4- 12.2cm diameter; 2mm thick
L5- 13cm diameter; 2mm thick
L6- 10.6cm diameter; 2mm thick
L7- 11.4cm diameter; 2mm thick