This canner has only 40,210 seams. The nitro doser has only been used once. This canner includes: -Manual Infeed (Date Coder Ready) -Can Flip and Rinse -Can Rinse Tunnel Great canner! Will do around 24 cans a minute. The Liquid Nitrogen Doser can be removed when not in use. This canner will do sleek, standard 12oz, and standard 16oz. You can order other parts for other can sizes.