The Custom 4" Square Ear Front Bag is for use on a mechanical front rest. This bag was designed to use with flat forends measure 4" wide. Available in Slick Silver, Regular Leather, B.B. Leather 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 4" inbetween the ears and has a base size of 2 1/4" W x 6" L x 2-1/4" H, 1-1/8" from base to where forend rests and 1-1/8" tall ears. Made in the U.S.A 100%.