This is a highly detailed replica of "potato masher" grenade adopted in 1924 and was used through the close of WWII. Copied from an original in a private collection. It includes original markings and the bottom cap unscrews and igniter string and ball drop out, but can not be pulled and removed. 13 3/4" ong, wt. 10oz. It is a display only and will not explode. Can not ship to Canada.