There are approximately 100x standard sized 5/16"X1" spiral cut birch dowels. Sterilized and inoculated with organic grain spawn type Shiitake "3790" wide range mushroom plugs with basic instructions. Free shipping in the USA included.
 
There are a few options to choose from, including a combo with a drill bit and 6oz of soy wax with an application dauber to save you money!