This Nocturnal Lights Aluminum Single Section Ball-Joint Arm Combo includes a 12" ball-joint section used to join with 2 ball-joint clamps. Use the included Nocturnal Lights ball-joint clamps to attach the arm to a ball on your housing or housing adapter, and the top clamp to a ball joint adapter on a Nocturnal Lights light.The arm is constructed from light but sturdy anodized aluminum. The 1" ball has an o-ring; this helps the clamp to hold the section in position without slipping.Standard Package Information:-12" Ball-Joint Section -2 x Ball-Joint Adapter Clamps -1-Year Warranty