The Single Tank Adapter (STA) - Stainless Steel is a robust and practical solution for divers looking to secure a single tank to their backplate. Crafted from stainless steel, this used STA is durable and designed for functionality, though it shows some minor rust spots typical of 304 stainless steel. It features welded bolts, likely 5/16" thread, providing a secure attachment point, though you'll need to determine the correct wing nut size. This adapter comes with well-used but fully functional tank bands, making it ready for immediate use. It's an economical choice compared to new options, offering reliable performance at a great value.