The plates are constructed of high grade, low extract-able polypropylene, which imparts excellent temperature and chemical resistance. The wells are square with a conical base to aid in sample concentration and recovery. Two well capacities are available to meet a range of sample handling needs. The 48 well plate is available in volumes of 5 ml, and 7.5 ml . The plate dimensions meet SBS specifications, making them compatible with robotic sample handlers and other sample processing equipment. Santoprene™ sealing mat, available separately, individually seal each well. The strips can be pierced repeatedly and will reseal upon removal of the needle. Plates can be heat sealed and stored for prolonged extended periods of time at -80ºC.