AERON Aaron prepreg full carbon boom, 140-190cm. The mast attachment part is compatible with RDM masts. The boom grip has little peeling. There is grip peeling on the part where the harness attaches. There is a crack in the pin part on one side of the boom lock (see the last image). (The lock part can be purchased as a repair part at shops, etc., so replacement is recommended.) Shipping will be to the Seino Transportation sales office, so please specify the sales office near you (shipping to private residences is not possible). Shipping to Hokkaido, Okinawa, and remote islands is not possible.