The #1F Small Owl Ear Front Bag is for use on a mechanical front rest. This bag was designed to use most common hunting rifle stocks used today. Available in All Leather, Slick Silver or Cordura. Our bags come standard filled with Regular Sand weighing 1.2 lbs. but you can also choose Heavy Sand 2.0 lbs. or Empty to save on international shipping. The bag measures approximately 1-1/2" - 1-3/4" inbetween the ears and has a base size of 2 1/4" W x 5 3/4" L x 1" H. Made in the U.S.A 100%.