DAA Mr.Bulletfeeder Replacement Dropper Set of Steel Ball Bearings by Double Alpha Academy 

A replacement set of three steel ball bearings for your bullet dropper die. You need to select the correct size for your caliber:
5.56/.223: 6mm ball bearings
7.62/.308: 5mm ball bearings
9mm/38: 4.5mm ball bearings
10mm/.40: 4.0mm ball bearings
.45: 3.5mm ball bearings