Wanting to see the back of th O-Sink is fine. As the manufacture of the part I am happy to answer any questions about the O-Sink. I asked the question "what would you like to know" because a picture dosen't allways answer the question or tell the whole story. I didn't really like what seemed like a smart *** answer to the question from sombody who didn't even ask the question. Chevrofreak .
Important elements were missing from the initial posting. Like which size O-Sink? there are 3 sizes at the moment.
Is a picture of the "C" cell O-Sink. One is the "OLD" Size and One is the "NEW" Size.
As you can see one has an E-Can fitted to it. This is not how they come it is simply an illustration of the fact that an E-Can fits perfectly into the"C"(old and new) O-Sink.
The inside diameter of the "C" Cell O-Sink is .752 inches or there about. The depth is 0.274 inches the. Depth with a E-Can is 0.351 inches.
A "D" Cell O-Sink is 1.192 inches with a depth of 0.341 inches.
If you need any more iformation please don't hesisitate to ask. BTW there is a thread dedicated to the O-Sink here:
http://www.candlepowerforums.com/ubbthreads/showflat.php?Cat=&Number=952457&page=3&view=collapsed&sb=5&o=365&fpart=1
Thanks.
Yaesumofo