These are machined bar stock hair stackers made by Peak Fishing of Loveland, Colorado. These stackers are hex shaped so they won’t roll off your table. The metal is non plated to avoid static electric charges that make hair stick to the inside of the barrel. The jumbo stacker is 1.13” in diameter and 3 9/16” deep. This is ideal for making saltwater bucktails, bass bugs and New England streamers. The jumbo’s barrel allows you to mix and blend colors to create speckled hair bugs. This is used by Pro Staff member Pat Cohen. The standard is a perfect size for making muddlers, elk hair caddis and royal wulffs.