PLATEN WAS FOR A TWO-POST PRESS. PLATEN EXTENDED PAST THE POSTS SO THERE ARE 6 ½” HALF-ROUND CUT OUTS ON THE RIGHT AND LEFT SIDES. THE DISTANCE L TO R BETWEEN THE CUT OUTS IS 35 ¼”. SIX ¾” X 18” LONG CARTRIDGE HEATERS RUN FRONT TO BACK. QUANTITY OF 2. (ITEM # 887)