Renzetti Double Ended Hair Stacker- Midge- Hair stackers are used to align the tips of hair cut from a hide. The Renzetti Double Ended Midge Hair Stacker has an aluminum base and 2 brass barrels. One barrel is 1" long with an inside diameter of 1/8" and the other brass barrel is 1 1/8" long with an inside diameter of just over 1/8". The brass barrels are smooth to allow the hair to slide easily. The aluminum base has rubber pads on either end to protect your table. Made in the USA.