The calipers pictured are different than the ones that I have. The portion of the caliper where the mounting bolt goes through is different. Mine is not as thick. Here is a link to the pelican parts page. I am pretty sure that these are the calipers I have, or at least I what I can tell from the pictures.
http://www.pelicanparts.com/catalog/...boxter_pg7.htm
The best way to determine your disc thickness is to measure the distance betweeen the posts that the pads rest on.