.645 MAGAZINE TUBE Make: Marlin, Winchester Model: 1866, 1873, 1892, 1893, 1894, 94 Seamless tubes (originals were seamed) restore proper functioning and good looks; simplify future repairs. Gunsmith fitting required. .645 tube ships in the white, may require polishing prior to fitting. SPECS: O.D.' is approximate: .645 (16.3mm) O.D. x 26" (66.0cm) fits Win. '94 .25-53, .32 Spec., .30-30, .32-40, .38-55; Win. 1866; Win. '73 .38-40 & .44-40; Win '92 .38-40 & .44-40; Marlin 1893 & 1894; Lever Action. .645 tube ships in the white, may require polishing prior to fitting.