Lorell Adjustable Glass Protective Barrier - 30" Width x 41" Height - 1 Each - Clear - Tempered Glass, Aluminum Glass protective barrier provides protection against airborne viruses and for safer business transactions on your countertop or table. It adjusts in height from 29" to 41" so you can have a larger opening below the barrier. The 1/4" thick, tempered glass is clear for easy visibility. It features a stabilizing aluminum frame, rounded corners and polished edges for a professional look.