The Krystal are designed with clear white bottoms for luminescence/ fluorescence or black for fluorescence assays. The clear bottoms provides a clear reading view above or below the plate. The device is ideal for routine fluorescence, luminescence and scintillation assays 384, 96 or 24 well format. The plates are available with tissue culture treated or high binding. The Sleeved plates with lids can be used in robotic systems. The plates are also available with bar coding systems. The plates come in 3 formats 384 x 120 µl/well, 96 x 350 µl/well and 24 x 3 ml/ well to meet various applications and can be ordered tissue culture treated. The 24 well plates also comes with a high binding irradiated surface. The 384 well and 96 well plates are supplied in packages of 100 or in an HTS pack which includes 4 sleeves of 25 tissue culture treated plates with lids.