MEC Outdoors 20 Powder Bushing Size #20
http://www.tandktactical.com/shop/098489013000-mec-outdoors-20-powder-bushing-size-20-7058
http://www.tandktactical.com/web/image/product.template/7058/image_1920?unique=7dd3482
Mec's Powder Bushing regulates the amount of powder for your shotshell load.
