Displays2go Acrylic Collection Boxes with Removable 9 x 11 Inches Header for Tabletop or Wall Mount, Set of 2, Clear (CB8511CL) Includes 4 predrilled holes for wall mounting. Clear acrylic construction is strong and durable. Locking lid comes with 2 keys and prevents tampering. Removable frame can post 9 x 11-inch customized signs. Displays2go SKU#: CB8511CL