Mini Bank White 12x16" Made with Black Rip Stop nylon exteriors, white or silver interiors, translucent white diffusion front screens, adapts to either shoe or handle mount strobes. Requires Speed Ring and Flash Bracket.
It will work just fine with an Alien Bee as long as you have the correct Speedring to fit on the Alien Bee. Also, because of the smaller size, you might not want to leave the modeling light on... too much heat build-up inside the box could damage it.
What speedring do I need to attach this unit to a canon 580ex 11 camera flash?
You will need both a speed ring and a flash bracket to utilize this softbox with a Canon Speedlight 580EX II. Chimera suggests this unit; http://www.adorama.com/CM2800OP.html