This is a 530 SDM mast. I was using it for an iQFoil sail. I've used it quite a bit, but it shows no signs of breaking, and you can still use it actively. Mast protection is attached to the areas where the iQFoil sail's camber hits. (See photos 3 and 4) Please feel free to ask any questions about the condition. I prefer to hand it over in Kanagawa Prefecture, but if you're willing to pay for shipping, I can also ship it to a Seino Transportation depot. Thank you for looking.