The ATA-27 automated arrayer is designed for making construction of high-density tissue microarray blocks fast, accurate and reliable. The instrument can accommodate nearly all current tissue cassettes and can be easily adapted to array large or odd-shaped archival specimens. The ATA-27 accepts a full range of punch sizes from 0.6 mm to 3 mm and can produce up to 26 replicate array blocks in a single run. The system comes equipped with high-performance PC pre-loaded with custom software for mapping donor cores to a single or multiple recipient cassettes. Advanced options allow the user full control over many of the process variables that optimize the successful creation of recipients given a large diversity of donor tissue characteristics. Once programmed, the ATA-27 needs no user interaction to create an array. The instrument is equipped with a 110/220 volt power supply and easily fits on a laboratory bench. Base pricing for the ATA-27 includes delivery, setup and one day of individualized training at the user's laboratory (US only - available outside the US for an additional fee) and one year of technical and warranty support.