Any Idea?
 

I found these rubber blocks in the store today. Anybody out there recognize what they might be for? They were in my Carrier parts from years gone by, so I can not help but think they are something to do with a Carrier, but I maybe wrong. They are about 3" long x 1&1/2" wide, with a rounded end and two recessed holes, and on the underside is a slight step in the rubber block, Cheers Andrew.

I assume that there are no markings? (because you would have said so)

You are such a mind reader!, and correct there are no markings.