SmallRig Holder for Portable Power Banks BUB2336 is designed to attach a power bank to the camera rig when a sustainable charging solution is required. It holds power banks with width ranging from 53mm to 87mm, which covers most products in the market. On the top, bottom and back of the holder are 1/4"-20 threaded holes, which makes it convenient to attach the holder to different places. For example, you can mount it to the front of the SmallRig Top Handle 1638, SmallRig Dual Rod Clamp 942, SmallRig BallHead Arm 2070 or SmallRig cages. The holder features soft protective rubber pads inside, keeping the power bank securely in the clamp and preventing scratches.