Believe I remember these are Vickers bbls but could be wrong. Have been saw cut to ~21". Don't remember where/when/why I bought them and don' know what anyone would do with them but hate to just toss. Bore on unwrapped one looked pretty grungy but cleaned right out with a brush stroke. Assume they're .303 but not sure and don't have any ammo left to check. If you're willing to pay for the ride, you're welcome to them (~12-13lb from 36830).