634011-N, NEST 1.5 mL Self-Standing Vials, Natural Color Caps, External Thread, Hinged Cap with Sealing Ring, Sterile, 50/pk, 500/box, 2000/cs • Add cap colors: 6 vial cap colors (blue, red, yellow, purple, green and white) for personalized identification of different types of reagents in a faster and more convenient way.