Godox ML-CD15 Collapsible Flash Diffusion Dome Kit with Adapters.  It comes with a round-shaped dome, made from high-quality silica gel. With the different adapters that come with this kit, you can work with various types of flash/strobes.

The kit is in very good/excellent condition.  Selling because I no longer need it.

From Godox website:

More Possibilities than You Expect Collapsible design opens several ways to shape light. Use diffusion dome in fully extension for 360-degree lighting, or collapses theback to diffuse at 180 degrees, and when collapsing the front, you can change the light quality for more dimensionality.

*Round head adapter: Round head adapter is applicable to all Godox round head flash, such as V1 series flashes, AD100PRO Pocket Flash, and AD200PRO round head flash.

*Rectangle to round head adapter: Rectangle to round head adapter is applicable to most square head flash, such as Godox V860II,V860II,V850II, TT685II, TT685, TT600, TT560II, TT520II, TT660S, AD200 square head flash and square head flashes of other brands.(Noted: the ML-CD15 Diffusion Dome can't fit TT350 Camera Flash)

*Godox mount adapter: Godox mount adapter is applicable to all Godox video lights, such as ML30, ML30Bi, ML60, ML60Bi, AD300PRO, AD400PRO."