Acrylic Slatwall Display Case Tower. The Rectangular Slatwall Display Case has 2 stationary shelves that are removable. The 2 shelf slatwall display case tower is locking and has a single door. Keep your merchandise safe behind lock and key with this acrylic display case tower, while featuring it on your slatwall. This acrylic slatwall display case is also called a slatwall showcase tower with 2 shelves.