Andoer Acrylic Clapboard Dry Erase Director Film Movie Clapper Board Slate 9.6 11.7 Computer-engraved English letterings for longevity. Large-size: 24.5 * 29.8cm / 9.6 * 11.7in. Acrylic material and non-wood produced, easy to be written or cleaned. Magnetic sticks ensure firm and audible closure. Special design and powerful enough to avoid crack. ?