The 9-Section Acrylic Production Slate with Color Clapper Sticks from Elvid is a production slate made of white acrylic designed to be used with dry erase markers. It uses standard-size color clapper sticks to provide visual and audio sync points when using a separate device to record audio (dual-system sound). The full slate measures 9.25 x 11" and features engraved text and lines. -Slate Sections -Roll -Scene -Take -Production -Director -Camera (Cinematographer/Director of Photography) -Cam (e.g. A or B) -FPS -Date and Misc. ( Day/Night, INT/EXT, MOS/Sync)