Neewer Portable Rectangular Softbox with Bowens Mount 60 X 90cm / 23.6" X 35.4" for Canon Nikon 300w 400W 600w 800W 1000w Studio Flash MODEL: SB-BW69 Softbox size (cm): 6  9 (23.6" X 35.4") Mount type: Bowens Shape: Rectangular Aluminum Ring Adaptor