Description: 5" Diving Flash Light Ball Arm Joint to Underwater Housing. Wide Application?mount flash light, on-camera field monitor to sliders, tripods more photography device with 1/4" hole. 25mm/1" diameter ball head , suitable for ball clamps and accessories. Part of the ball arm mounting system. Made of high quality aluminum and pc material for long time use. Specification: Material: Metal Ball Head Diameter?25mm/1" Size?15*2.5*2.5 cm/5.9*1*1 inch Package Includes: 1x Ball Arm(5")