These guards are designed to protect samples during weighing. They enclose the balances, leaving the controls exposed for easy access. The hinged lid offers direct access to the weighing pan. A 1″ hole on the top of the lid allows for sample dispensing. This guard is designed for use with Mettler Balances with a housing of 2-5/8″ high x 7-3/4″ wide x 12-1/2″ deep and equivalently sized electronic balances.