This all brass antique looking powder flask is the perfect companion to your Colt .44 or .36 caliber revolver. The easy to use spout holds 24 grains of black powder in the .44 version and 15 grains in the .36 caliber version. The flask can hold approximately six ounces of black powder and is ornately decorated with a cannon and two crossed flags on each side. Available: .36 caliber, .44 caliber. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Flask.