From the Manufacturer:
This padded belt pouch has enough space to accommodate pro-size DSLR flashes. Either the SB-910, 640EX-RT, or smaller flashes fits with a standard diffuser fitted. The front pocket fits an external battery pack with a cable pass-through to keep it attached to the flash. Includes pockets for small gels or spare batteries.
Accommodates one pro-sized flash with (most) diffuser(s) attached. Specially designed front pocket with cable pass-through will hold external battery pack attached to strobe. Also has 4 slots for gels and/or extra batteries.
Every modular component can be locked on a belt to keep bag in place on any of our camera belts.
Components can "Rotate or Lock" on the belt. To rotate, place the white plastic tang behind the belt while attaching the component. Rotating the component prevents the weight of the equipment from creating a pressure point on the hip by being stationary for an extended time. Also, moving the component to a different place on the belt allows a photographer to assume a different position such as kneeling, bracing against a wall, or lying prone without damaging gear. If locking the component in position is preferred, slide the plastic tang down into the fabric loop on the belt or rail while attaching the component. This prevents the component from sliding along the belt.
Every modular component has a rain cover included in the bottom zippered pocket.
Attaches to all Think Tank Photo belts and belt packs.