20 pieces These are rollers for making Japanese "Yaen" fishing lures, for DIY use. There are 6 pieces. They have been tested in actual fishing several times. They work very well. They are thicker than the rollers I have listed before. The hole diameter is 1.2mm, and a stainless steel rod of that size will pass through. 1.0mm also works well. There are 22 colors available. Please specify your preferred number after purchase. * Added No. 23, Black The quantity can be mixed.