Accessories for Fathom MK and Gemini rebreathers: head-to-loop connection caps for both the threaded (pre-Nov 2025) and 2-start bayonet (Nov 2025 onward) connections, head protective covers, and other gear that works with these units.

The collection includes parts designed and machined by Rugged Scuba alongside compatible products from other manufacturers. Check each listing for which head version it fits.

Rugged Scuba is not affiliated with Fathom Dive Systems. Fathom, MK, and Gemini are trademarks of their respective owners, used only for compatibility identification.