Optional cover for Bel-Art 96-Place microtube racks (SKU's: F18845-0009, F18845-0010, F18845-0011, F18845-0025, F18845-0026, F18845-0027, F18845-0028, F18845-0029, F18845-0030, F18845-0031, F18845-0019, F18845-0020, F18845-0021, F18845-0022, F18845-0023,