All lids are made of rigid polystyrene except where indicated.

All lids have a corner notch on the A1 corner (except where indicated) to correspond to the corner notches found on all Corning® microplates.

The universal lid without a corner notch (Cat. No. 3098) does not need to be oriented in any particular direction to be placed on Corning microplates. The lid also has a shorter skirt than standard lids.

The black universal lid (Cat. No. 3935) is suitable for fluorescent and other light-sensitive assays.

The DMSO-resistant cyclic olefin copolymer (COC) lid (Cat. No. 3085) is tinted amber in color for light-sensitive assays and is 100% DMSO-resistant.