The filled shell, without the fuze, weighs 7 lb. 15 oz. 8 drams and is 8.9 inches in length.

The shell has a comparatively thin wall and is fitted with a copper driving band. There is no base plate.

The bursting charge consists of 1.25 lb. of pressed T.N.T. which in quality corresponds approximately to "Grade 2". A cavity is formed in the charge to receive the steel burster container which is screwed into the fuze hole.

The burster container has a felt disc at the bottom and contains an exploder consisting of a perforated picric acid pellet over two solid pellets of the same nature. These are en-closed in a paper container. The weight of the exploder is 22.7 drams.

A copper container, to receive the magazine of the fuze, is inserted above the burster container and fits into the perforated pellet at the top of the exploder.