The iDC Softbox Double Header II will accept all the various models of the Pocket Wizard, Flex TT5, and Radio Poppers, as well as Canon's Wireless ETTL configuration!
This is a gadget I always wanted and just couldn’t find: an elegant way to get two speedlites into a standard-sized six-inch softbox ring. This modular unit allows me to use any two slave-capable Canon shoe-mount speedlites including the 420EX, 430EX, 430EXII, 550EX, 580EX, and 580EXII. Also compatible with the following flex-head speedlites- Metz, Vivitar, and any Nikon without the newer pin-registration system.
The adjustable crossbar assures a perfect fit with any combination. The crossbar may be mounted in one of two positions. This assures that the flash heads are ideally positioned whether you chose to point the slave sensor forwards or backwards.
More info on our website: idcphotovideo.com
Not compatible with the Nikon Radio Popper PX Mounting Bracket/base.