The Pedersoli Colt Pattern Black Powder flask is made of copper and comes with a caliber specific threaded spout. This spout can be removed and changed to a different sized spout that Taylor's offers. Features a cannon and flags scene with a spring-lever top. This flask is ideal for .36 (comes with 15 Grain spout) and .44 (comes with 24 Grain spout) caliber black powder revolvers. To use this flask: screw on the spout on top, cover the top of the spout with your finger, flip the flask over and press the spring lever to allow powder to fill the spout, let the spring lever return to rest, flip the flask back upright and remove your finger, the spout is now full of powder and ready to load into your gun. This flask holds about 8 ounces of powder. FeaturesSize 1.36 Caliber comes with a 15 grain spout.44 Caliber coems with a 24 grain spoutRemovable and replacable spouts