ThermoGrid PCR Plates are rigid, one piece plates with 0. 2ml wells and extremely uniform thin walls for exceptionally rapid temperature transfer from thermal cycler blocks. Each well has a slightly raised rim for compatibility with all types of lid closures and films. The black printed alphanumeric make sample identification easier. All are supplied in natural color and most are available in violet, yellow, green, pink, and blue. RNase, DNase, pyrogen free.