At present、we are looking to buy propeller and propeller shaft system for 20000 dwt vessel、including 02 sets per vessel.1) Technical requirements:- see attached drawings (1 clockwise propeller and 1 counterclockwise propeller).- other techinical requirements depend on manufacturer.2) Delievery time: 9 - 11 months. We are looking forward to receiving your early competetive quotation. Thanks and best regards