25mm ball clamp for Underwater Photography strobe arm
Similar to INON, Ikelite, Sea&Sea, etc
25mm (or 1 inch for the Americans) ball joint for use with a underwater strobe arm.
These things are typically anodized Aluminum and $25 each for the cheap Chinese versions and $50 for the USA company ones (Ikelite et al). Since you need 3 on each strobe arm, you can save some by making your own.
Also: since they are made of ABS, they weigh less underwater (less weight, more buoyancy due to higher volume as plastic is not as strong as metal)
NOTE: UNTESTED with branded equipment. Tested only with my own printed ball joints. Locks pretty tight, but not 100% perfectly rigid as would occur with metal arms/joints.
IF YOU MAKE THIS, READ THE INSTRUCTIONS !!!