Features: Computer-engraved English letterings for longevity.Large-size: 24.5 * 29.8cm / 9.6 * 11.7 inch.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. Specifications:Material: Magnetic strip + AcrylicWriting way: Use the high-quality felt pen or marker pen， and erase it after use (pen not included)Used for: Film， TV plays， studio live， advertisement， video， etc.Clapboard size: Approx. 24.5 * 29.8 * 1.8cm / 9.6 * 11.7 * 0.7inClapboard weight: 360g / 12.7ozNote:Don't use the greasy pen， otherwise it can't be erased.Package List:1 * Clapboard