Microtube, 0.5mL, Self-Standing, Attached Screwcap for Color Insert, with O-Ring, STERILE, PP, 200/Bag, 5 Bags/Unit0.5mL microtube, self-standing, with attached screwcap for color insert, with o-ring, STERILE, polypropylene (PP), 200/bag, 5 bags/case (1000 each) Qty/Unit 1000