This is the Steel Case Tube fitted to numerous Seamaster models, please view images to identify if it's correct as Omega specify 2 or 3 of these for similar models.
These are Omega supplied service case tubes.
Stainless Steel Threaded
090st1232 Omega Seamaster Watch Pendant Case Tube Threaded Steel
Items can only be returned if either faulty, in the case of the item not being required then it must be returned exactly as received. For example if the item is new in a sealed packet and/or has protective covers in place then it must be returned the same otherwise item is no longer new and the value is greatly reduced, these items can only be returned/refunded by agreeing a lower value with Swiss Limited Editions before returning reflecting the new lower value of the item.