Features:

Outer Diameter: Approx. 45cm/ 17.72"
Inner Diameter: Approx. 18.5cm/ 7.28''
Lens Opening Depth: Approx. 15cm/ 5.91"
Material: Fabric + Iron Rods
This round softbox using reflective fabric of higher reflectivity, rigid frame of more elastic, translucent soft cloth of more diffuse, lens opening of trapezoidal design, flash window of light leak-proof design, so that the same flash brightness improved by 10%, and the softbox durability increased by 10%
It is easy-folding style, metal tube bracket with magnetic, expand in ring shape, trapezoidal structure, easy to install large lens with hood, equipped with special bag
It's the ideal lighting modifier for your speedlite. The softbox front designed with diffuser, turns your speedlite into a ring flash to get perfect lighting and offers even and smooth light
Fits most DSLR's with standard & telephoto lenses & flash combos

Compatibility:
For Canon 600EX-RT/580EX II/580EX/550EX/540EZ/430EX II/430EX/420EZ/380EX
For Nikon SB910/SB900/SB800/SB700/SB600/SB80DX/SB28/SB26/SB24
For Sony F60M/F58AM/F56AM/F43AM/F42AM/F36AM
For Pentax AF540FGZ/AF500FTZ/AF360FGZ
For Olympus FL-600R/FL-50R/FL-36R
For Sigma EF-610/EF-530/EF-500
For Nissin DIMG8000/DI700/DI600/DI866/DI622
For Metz 58AF/54MZ/50AF/48AF/44AF
For iShoot 582C/E430 ......

Package included:

1 x Round Softbox
1 x Carrying Bag