Clock Protection Cover Guard From Sports Damage Vandalism PROTECH SHIELD for CLOCK COVER PROTECT FROM SPORTS AND VANDALISM. Clock Protection that is Attractive, Durable and Affordable. Protect clocks from sports, balls and vandalism while almost looking invisible. Made from 1/4" thick super durable Optix acrylic which is 10 times more durable than glass. Supported by 4 - 3" x 5/8" aluminum stand-offs with rubber washers to absorb impacts. * INCLUDES A 10 YEAR NO BREAKAGE WARRANTY *