The Phottix Pro Easy Up HD Umbrella Softbox with Grid 90x90cm is made with internal white fiberglass spokes for high durability, and is perfect for on-location shooting. It folds down like a regular umbrella but expands straight into a square softbox for instant use, saving time over traditional softboxes which require rods and speed rings for assembly. The recessed-front diffuser allows for more precise positioning and feathering of light. Included is a removable grid to better control light spill in situations when accuracy is essential. A flash or studio light mounts backwards inside the softbox. Shooting towards the rear creates an even light which reduces any photo spoiling hot spots. The Phottix Pro Easy-Up HD 90x90cm Umbrella Softbox can be collapsed and stored in seconds, easily transported or stored. NOTE: The Umbrella shaft on this product will not fit through central tube mount on an Elinchrom head.