Hardboard Clipboard by Unisub®, 9" x 12.5" x .125", 2-sided with flat clip. 1/8" Sublimation Hardboard, White Gloss. Ships with snap rivets that assemble using a hammer and drill bit punch. Custom sublimation clipboards with dry erase surfaces allow your clients an indispensable yet inexpensive coaching aid. Mix/match and bundle with sublimatable Notebooks,