PlateFlagsType enumerated type The PlateFlagsType enumerated type specifies whether the labware has a lid, is sealed, or neither. Constant Value Description STACK_NORMAL_PLATES 0 The labware does not have a lid and is not sealed. STACK_LIDDED_PLATES 1 The labware has a lid. STACK_SEALED_PLATES 2 The labware is sealed.