- Brand: SEA&SEA This adapter is required when attaching an NX mount port intermediate ring or port to a housing with an ML mount port. Retail price: ¥33,000 Purchased new, used for approximately 50 dives. [Size] Maximum diameter 133mm x depth 41.2mm [Weight] 199g [Depth rating] 100m [Material] Corrosion-resistant aluminum alloy (anodized) [Length from the mount surface to the port tip] 30mm (with port lock mechanism) There are no noticeable scratches, but please understand that this is a used item before purchasing. Thank you for viewing.