Made of strong polypropylene (PP) Polypropylene basins are chemically resistant to alcohols and mild organic solvents PP 12-channel basins are double sided: the 12-channel side has a capacity of 5ml per channel; the other side (single-channel) has a capacity of 50ml PP 12-channel basins are available in assorted colors: clear, blue, green, pink, and yellow PP basins are bulk packaged (non-sterile)