Carlisle Extra Heavy Duty Raft Oar ShaftThe Carlisle Oar Shaft is the industry standard for an outfitter grade basic oar. This Aluminum Inner Plastic Sheathed shaft is lightweight and stiff, giving you good performance for a low cost. Shaft lengths are listed as the final length, which will include the approximately 27" long blade you choose (sold separately). For a list of ACTUAL shaft lengths, please see the Specs section. The 1 7 8" outside diameter thick walled tempered aluminum tubing