All rubber discs (except silicone) are approximately 1/2” to 9/16” thick and consist of 1/16” layers.
One set of rubber consists of two discs, one with a hole and one without.
Original “H” formula is recognized in the industry as the best rubber for tin, lead, and antimony alloy castings. It is the strongest and longest-lasting rubber available and has excellent tear and abrasion resistance. Perfect for both thin and thick castings. Identified by yellow poly covering.