these barn doors should be in the bags of every one who seriously works with off-camera flash's. and even though it was designed for Adorama's budget flash it will fit on other types as well.
Will fit a vivitar 285hv perfectly
canon 580ex II using the four tightening screws
Im sure many others as well.
the only Con is that the doors can not be positioned precisely.
GREAT VALUE for the money! Does not fit real snuggly on my flash head but I can build the surface up with gaffers tape to snug it up. Great for getting some unusual effects with shoe mount flash.