45cm/18" Collapsible RoundFlashThis ring flash softbox is made of fabric and rods， collapsing much like a softbox. At 18" in diameter， the assembled softbox provides quite a large light source， especially when compared to alternative adapters. A ring flash is a donut of light that sits around the camera��s lens. Because the light comes from all directions， the shadows cancel each other out. A softbox works by making the light much bigger， thus softening the shadows it casts and flattering the subject.- Easy fold design， ring-shaped when unfolded， the maximum diameter is 45cm (18" )， thickness is 13cm， inner diameter is 13cm.- Softbox front designed with diffuser， the internal with reflective materials.- The top reserved an opening for flash unit with width adjustable.- Skeleton made of magnetic iron pipe， easy to fold and easy to carry. Package Including: 1 * 18in Ring softbox 1 * Carrying Bag