We are now offering the DPS foam units in a 4 oz. size. The 4 oz. unit is 5-3/4 inch tall and holds twice as much spray as a 2 oz. unit. We have not offered this size in the past, but more and more correctional facilities have been requesting we bring a 4 oz. unit into our lineup. DPS prides itself on being a law enforcement and corrections spray and we listen to the needs of the officers in the field.