Very nice quality carbon wing tube and sleeve – metric sized. These are robust and probably over 500 pound breaking strength. The tube is 21mm OD with a 1mm wall. The sleeve is 22mm OD. Total length is 850 mm. We ordered a small batch of these to investigate using them as alternatives to 7/8 carbon tubes for classic pattern models. We’ve elected to stick to the standard sizes so we have a few of these available. Flat rate shipping is included in the price for lower 48 states.