1 inch tube, no marks, serial number 366193X, add 18$ shipping in Canada. Lifetime warranty Shipping, if needed, at your cost. If you have a hunting firearm you would like to "trade in" and if you can drive to me, ( Innisfail, Alberta, just south of Reddeer) I will consider your in person (only, no exceptions please) trade ins . Please call or text 403 556 0086 Please see my other ads. I have lots of rifles, shotguns, Scopes / ammunition / slings / cases etc available for extra. I can mount and bore sight for you too. PAL verification required. NO COD, cash or e transfer payment needed. Return customers / locals always given preference.