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.  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%.