This new tin cap has a metal spout to pour powder into your measure, refill your horn, or top off your flask. This cap fits the metal GOEx black powder cans. It will not fit the current production plastic GOEx cans.
The NMLRA and most club rules require that powder caps be covered. An empty .40 S&W case, not included, makes a perfect range cap for this brass spout. Knock out the spent primer, screw in a tiny brass eyelet, and tie it with a six inch lanyard of artificial sinew or strong cord.