Universal Foldable Soft Box Flash Diffuser Dome for SLR & DSLR Flash Universal Camera Flash softbox (sa-07) Works with many external flash units such as Canon, Nikon, Sony, Olympus, Pentax, and more Folds flat, making storage and transport simple Attaches to flash unit with velcro and a rubber grip strip Fully extended dimensions: 4.9in Wide x 3.9in High x 3.3in Deep (12.5 x 10 x 8.5cm), Dimensions of back opening that attaches to flash: 2.4in Wide by 2in High (6.2 x 5cm)