Check the listing for details. 1903 Springfield Barrel Shim (Z-1051). Condition: New other (see details). Listed at 24.99 USD. 1903 Springfield Barrel Shim New. Very Old stock. From a long defunct U.S. arsenal. These were used by armorers to correct headspace and indexing when rebarreling 03’s and A3’s. O.D. Is 1-1/4”. I.D.is 1.040 Thickness is .004" Please note; these are close to 100 years old and will have some storage corrosion that does not affect function. *** Please look close and / or ask questions before buying. There may be different versions of this part. To be installed by a competent gunsmith. *** We are a small family business and we appreciate each and every customer. The best thanks we can get, is our customers leaving us a positive feedback review. Our business is directly dependent on your feedback. If you are happy with your purchase please take a minute to do this. If there is a problem with your order please give us a chance to correct it, please do not hesitate to contact us. Hi