Round well design with a solid black flat bottom. 2.8 mm distance between well bottoms to plate bottom. 50µL total well volume, with recommended working volume of 5-40µL. High base plate design is compatible with automation and for bar coding. Validated by Molecular Devices for the FLIPR reader. Outer wells aligned for proper viewing with FLIPR. Ideal for miniaturized 384 well fluorescent homogeneous assays. Nonbinding surface (NBS™) is a Corning proprietary treatment technology used on polystyrene microplates to create a nonionic hydrophilic surface (polyethylene oxide-like) that minimizes molecular interactions.