Built-in and removable proprietary Godox G-mount speed ring. The Godox GO5 Octa Softbox uses the new Godox G-Mount, which provides a larger, and more robust connection compared to the standard Bowens S-Type mount. It also features electronic contacts, which lets the light know what modifier is being connected to it. This enables the light to intelligently compensate for any slight colour shifts caused by the modifier, for consistent lighting no matter what modifier is being used. The Godox KNOWLED GO5 5-foot (150cm) Octagonal Softbox is great for cinematographers, filmmakers, or lighting gaffers, who shoot documentaries, interviews, commercial advertisements, fashion films, music videos, and general video and TV productions. Features: Black interior Interior baffle Made with nylon and fireproof cotton. Item Type Softbox (8-Sided Octagon Shape) Interior Colour Black Light Compatibility Built-In Speed Ring with Godox G Mount Interior Colour Black Light Compatibility Built-In Speed Ring with Godox G Mount Interior Baffle Yes Materials Fabric, Nylon