looked on ebay for an example of the 45 and 60 Mine appears to be the 60 as it has two pins to hold the pads in rather than 1 pin that is on the 40mm examples below
******60******
http://cgi.ebay.co.uk/DUCATI-BREMBO-...cmd ZViewItem ******40******
http://cgi.ebay.co.uk/Ducati-Brembo-...QQcmdZViewItem