The Protektor Model Custom 3" Square Ear Front Bag is for use on a mechanical front rest. This bag was designed to use with flat forends measure 3" wide. Available in Slick Silver, Regular Leather, B.B. Leather or Cordura...**This listing is for the bag with our slick silver on top. *other options available on our website. Our bags come standard filled with Regular Sand weighing approx. 1.2 lbs. We also have heavy sand available on our website. The bag measures approximately 3" between the ears and has a base size of 2 1/4" W x 5 3/4" L x 1-1/8" H from base to where forend rests and 1-1/8" tall ears. Made in the U.S.A 100%.