Camera arm ball base

 Sea&Sea Camera Arm Ball Base for Underwater Photography The Sea & Sea Sea Camera Arm 8 Ball Base (Slide) is a base adapter to mount to the bracket shoe on a Sea & Sea housing grip. The unit allows you to attach a double ball arm with the ball clamp. The slide ball base is constructed of a corrosion-resistant, anodized aluminum alloy, along with rubber and plastic. [Dimensions] (WxH)] 33x72mm / 1.3×2.9inch [Weight] 83.5g / 2.9oz [Construction] corrosion-resistant aluminum alloy (anodized body)