https://boardgamegeek.com/boardgameaccessory/233281/brass-iron-clays

A set of 100 Iron Clays in 5 denominations for use with Brass. Contents: 40 "1" Clays 20 "5" Clays 10 "10" Clays 20 "20" Clays 10 "100" Clays 1 Plastic Storage Tray with Lid