13 cubic inch. 3000 psi. DOT and TC approved aluminum bottle. 5 year hydro. Weight: 1lb with Alloy Bonnet. Made in the USA. Adjustable from low, medium, or high pressure. Regulator lenght 1-3/8 " from top of the bottle to the bottom of the marker ASA. Lenght: 9 3/8" long x 2" wide. 120 to 140 shots per fill, depending on your marker.