This family of thermal cyclers has a variety of features centered on an updated user interface that makes it easy to program. Improved block technology offers improved heating and cooling rates for greater throughput. Products are available with either a high speed sliver block or an anodized gold aluminum block. Quick Start programming and convenient set-up allows users to accommodate as many gradients as needed. The “smart lid” design prevents breakage of sample tubes and assures reproducible results with all experiments. Its robust nature is designed for heavy lab use as a shared resource.