Acrylic Gridwall Display Case Tower. The Rectangular Gridwall Display Case has 3 stationary shelves that are removable. The 3 shelf gridwall display case tower is locking and has a single door and is made from crystal clear acrylic. This gridwall acrylic display case is also called a gridwall acrylic showcase with 3 shelves. Keep your merchandise safe behind lock and key with this acrylic display case, while featuring it on your grid wall.