12 piece assortment of brass nuts for Hubert Herr 1-day and 8-day cuckoo clocks (KW-60, Kw-75 and KW-80).
Three different sizes included. 8.15 mm OD , 4.15 mm ID lg hole, 8 mm OD , 2.4 mm ID 4.22 mm collar on back , 8.13 mm OD , 2.45 mm ID .
All sizes listed are approximate.