This is an ORIGINAL magazine tube for apre-64 Winchester lever action RIFLE in models 1866, 1873, 1892, 1894 (pre and post 64), in LARGE CALIBER .30-.30, .38 WCF .38-.40, 38-55, .44 WCF .44-.40 .45, .357 53, 64 also fits Uberti and Marlin large callibers . LATE model SEAMLESS TUBE These tubes have a length of 23 5/8 inches and an OUTSIDE DIAMETER of .645 are blued and have a hole drilled through the Forearm magazine plug screw. There are notches in the tube hanger ring pin and for the hanger so you are able to precisely fit the tube to the 24" barrel on your rifle. This is also the magazine tube Marlin models 1894, 1889, and early 1893, as well as the Sears model 54. The MAGAZINE SPRING that goes in this tube is part number ms73 (it comes with instructions on what length the spring should be cut to in relation to the length of your tube).