• Volume: 1.5ml opaque black tube to protect light sensitive compounds. • Attached flat top cap is easy to open and close with one hand. • All tubes are manufactured from high quality polypropylene and have smooth, flat surface polyethylene (HDPE) caps. • Temperature range: -80 to 120ºC. • Max RCF: 20,000 x g. • Packaged in packs of 500 in re-sealable bags.