Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Will this fit a Nikon D3100?
Document: I tried to fit this soft box over my flash units (both Canon and Nikon) and found it unacceptable. It's soft and floppy. A soft box should be stable.
I just receive the Opteka flash diffuser. It did not even come close to fit my Nikon Flash which looked like the one pictured in the ad. I called at once and returned it. [..]
I purchased this soft box, because in the description it stated that it would work on a Nikon SB-600. When I received it and put it together, the opening was way too large for the SB-600's flash head. When I tighten the velcro strap, the edges of the soft box bowed inward. I don't use the product, because it doesn't fit the flash properly and it falls off. I suppose I could rig it so it wouldn't fall off, but I shouldn't have to.
Good Price works weill - can;t beat the price for somethign this simple- using with my Nikon D60  ,, ,
This product is a waste of money. No different and no better than a defuser. Blocks the metering sensor on my Nikon SB600 flash.
This worked great for my Nikon 7100 I used it for a party and I would by this or other products from company again the product was as described.
Opteka Universal Studio Soft Box Flash Diffuser for Canon EOS, Nikon, Olympus, Pentax, Sony, Sigma, & Other External Flash Units is realy universal
Small light and easy to use. This product, when coupled with my Nikon SBH600 flash unit has helped me create stunning photographs with improved realness. Eliminate the harsh highlights of unfiltered flash!
Opteka SB-1 Universal Studio Soft Box Flash Diffuser for Canon EOS, Nikon,...Bower SFD296S Digital Automatic Flash for SonyBower SFD296S Digital Automatic Flash for Sony
"works like it says, softens the light I used it outside and it fills shadows well I love it. Great inside as well bounces off walls as well. Nikon D3000 on a Neewer Speedlite"
Answer: I'm pretty sure it would. It has a Velcro strap.