ULTRAMAX Helium Variable Buoyfloat Arm Extension Ring (.25 lb Lift)

This Helium Variable Buoyfloat Arm Extension Ring can be used to add more buoyancy to the ULTRAMAX Buoyfloat system. Made of corrosion-resistant anodized aluminum, the 2" extension segment screws into the arm assembly to add another 1/4 pound of buoyancy to your underwater photography rig.