The RMC Ox-Yoke Universal Black Powder Capper holds twenty caps. Solid brass body constructed of heavier material. The body is not made from tubing as others are. This allows precise control of the inside channel size with just enough space for smooth movement of the caps. One piece spring carefully engineered to work every time. No screws to work loose and fallout! Will feed every cap automatically when held in a vertical position while capping the nipple. Works with #10 and #11 caps. FeaturesDesigned with no screwsFeeds caps automaticallyHolds a quantity of 20 caps