10 gas mask with steel Helmet heads for British and commonwealth forces from 1916 to 1945 in 20mm or 1/72 scale. Heads should be removed from the sprue. Each casting has a post to be used to mount the head on your model. You can use these model heads on any manufacturers models, plastic OR metal, simply remove the head and fit. EWM models designed for separate heads already have a mounting point for these heads. Fix with a good quality super glue.