
| Whitney Brothers® Medium Gratnell Tray Whitney Brothers® Medium Gratnell Tray. Heavy-duty translucent trays provide flexible, tough storage solutions to suit all your classroom needs. Teachers love our trays for their durability Kids love them, too, for their ease of use and child-friendliness Lifetime warranty Medium tray is 17"L x 12-1/2"W x 6"H | Whitney Brothers® Medium Gratnell Tray- Whitney Brothers® Medium Gratnell Tray. |