8 1/2 x 11 sheet of cling  1/8" thick.  One side is cling cushion, one side is permanant adhesive.  Attach your unmounted rubber stamps to the adhesive side and cut out.  Peel off release paper and the cling side will cling to your acrylic blocks or any other non-porous surface.   Instructions included.

Cool tip:

CLING CLINGS TO CLING!!!

what does that mean?  If you have a block of wood or other handle.  Cut some cling to fit it.  Attach the cushion adhesive side to the handle. Peel off the release and stick your cling stamps to the clingy mount!