The Cannon Ring Is machined from 416 stainless steel. 416SS is a gun grade of stainless. The overall length of the barrel is 1.9” - 2.1” depending on the ring size. The larger the ring the longer the barrel. The fuse hole is for 2mm fuse. A wood box with velvet padding and fitted spaces for the accoutrements is included. In the box is 1 small jar that holds black powder, 1 small jar for fuse, 1 stainless steel scoop for loading powder and 1 brass ramrod. 2 pieces of 1” X 1” square aluminum foil is recommended for wadding (loading them individually). 2-3 day to ship, rings are made to order.