Deep Well blocks in SBS standard, complemented by the popular low-profile version, which thanks for the same standard dimensions requires 30% less space. The cavities are some 20% larger than conventional plates. The chimney form of the wells reliably prevents cross- contamination. Their precise, true-to-size form makes them highly suitable for high-throughput screening (HTS). Deep well blocks are made of polypropylene and are autoclavable at 121 ° C.