For use on a mechanical rest. Has hollow center to accommodate the forend of most sporter or varminter rifles. Bag size: 2 1/4" W x 5 3/4" L x 1" H (in the center), and approximately 2" to 2 1/2" from ear to ear in the center. Note: Bags are not filled with sand when purchased and will need to be filled by customer. Made in U.S.A. 100%.