SCCTBS05-20 5ml tip screw cap centrifuge tube 100 pcs/bag, 20 bags/carton 8.58 50 X 29 X 41 5 mL centrifuge tube screw cap 5mL tubes take all of the conveniences of standard 15mL conical tubes and scale them down for space efficiency and decreased natural resource consumption. Usable from -86 C to 110 C, these tubes are a valuable resource for boiling and for sample preservation at very low temperatures.