The Midge Renzetti Double Barrel Stacker has 2 brass stacker ends. The smaller size has smaller tube and a midge size. The center is brushed aluminum with a rubber coated end with flared brass stacker tubes. Made in USA. Ideal for tails, compara duns and smaller flies. Size 1/4’ OD x 1” and 5/16’ x 1 1/4”.