Microplates are manufactured from Clear Choice virgin polypropylene resin. Produced with uniform external dimensions and tolerances to meet ANSI recommendations for compatibility with equipment and robotics. These polypropylene microplates are biologically inert, exhibit low binding characteristics, offer a high temperature tolerance, and are resistant to many standard laboratory chemicals. These properties provide optimal conditions for laboratory specimen and compound storage. Microplates feature square-round internal well geometry to minimize wicking and air bubble formation. Conical well bottoms facilitate complete sample recovery, and the unique design and well depth enable many popular styles of pipet tips complete access to the plate bottom. Raised well rims aid in thermal, adhesive, or cap mat sealing. All plates are autoclavable and supplied without lids. Microplates are RNase-free, DNase-free, pyrogen-free, and free of DNA-polymerase inhibitors.