Selens 40.5&rdquo;/ 103cm Softbox Extendable Bracket Mount Adapter with Bowens Mount for Octagon Dodecagon Hexadecagon Parabolic Softbox, 55 pounds/25 kilograms Load Capacity [Material]: Made of Aluminum Alloy with strong and solid construction. [Extendable Rod]: The longest length of the rod is 40.5/ 103cm and the shortest length of the rod is 11.8/ 30cm, it can be extended into deeper inside of the softbox by moving it and locking it; Focus the light inside a deep para to get perfect soft light. [BOWENS MOUNT]: Comes with bowens mount base for studio light monolight with bowens mount. [Stability hook]: A hook at the end of the rod can hang other heavy objects to increase the balance. [Selens Warm Hint]: Comes with bowens mount only, softbox, studio light and stand are not included.