Available in 6, 12, 24, 48 and 96 well flat bottom configurations NEW — 96 well plates now available with a round bottom Plates are labeled with alpha-numeric markings for easy identification of individual wells Each well has a raised rim which nests into the rings on the single direction lid to reduce evaporation and limit the risk of cross contamination Lids have a stacking ring for added stability when handling tall stacks of plates All multiple well plates are packaged sterile (gamma irradiated) NEW – Now available in 4 well flat bottom, treated or non-treated configurations Thomas No. 1177Y90 and 1177Y96 NEW – Now available in 1 well configuration Useful for high volume and robotic screening of DNA libraries, as well as manual plating Same footprint as standard multiple well plates Suitable for dot-blotting bacterial clones on 11.4 x 7.3 cm (4.5 x 2.875 inches) nylon membranes Lids contain molded spacers to allow gas exchange and stacking rings for increased stab