I've taken this out of storage. I have no knowledge of it, so I don't know if it's usable. Please understand that I cannot offer any warranty even if there are defects. ※The following is AI-generated: This is a regulator set for scuba diving. It includes a gauge. The words "APOLLO" and "AQUARIUS" can be seen in the images. There are scratches, small marks, and dullness on the metal parts due to use. Please check the photos and purchase with the understanding that this is a used item. It will be shipped in simple packaging.