Beneath the Surface Port Float Ring
The Beneath the Surface Port Float Ring is designed to actually stay on your macro port. With three shapes to choose from, pick the one that bests suits your macro port. This helps keep it on the port so it won't slide off.
Flat - Larger Exension Rings
Stepped - Sea & Sea and some Nauticam Ports
Tapered - Nauticam and Aquatica Macro Ports
Each float ring consists of 9 buoyancy float pieces and a velcro strap.