Being able to Communicate Underwater can really make Diving More-Fun. Having something to write on can cut down on playing charades underwater and get to the point. This Slate has the Best-Writing and Erasing Surface. It uses Bright Neon Tubing to Retain the Pencil and includes a Male Buckle compatible with the UN-QUICK System for attachment to your equipment to prevent it from being lost. Slate measures 4" x 6" (10.2 x 15.2 cm) and Easily Fits in BCD Pocket. Slate also has an Eyelet for attachment of a Lanyard.