Round well design with a solid black flat bottom2.8 mm distance between well bottoms to plate bottomValidated by Molecular Devices for the FLIPR reader. Outer wells aligned for proper viewing with FLIPRIdeal for miniaturized 384 well fluorescent homogeneous assaysNot treated (or medium binding) polystyrene surface is hydrophobic in nature and binds biomolecules through passive interactionsSuitable primarily for the immobilization of large molecules, such as antibodies, that have large hydrophobic regions that can interact with the surface (binding capacity of approximately 100 to 200ng IgG/cm²)