with 10 bright white loose paper sheet which can be used from both side surfaces. also with unique feature of refilling the pad board with new 10 sheets once got empty. (reusable pad boards) available size for “a” “b” “c” “d” “e” s-173 9” x 13” s-174 11” x 17” s-175 12” x 20” s-176 17” x