SCCTB05-20 5ml self-supporting screw cap centrifuge tube 100 pcs/bag, 20 bags/carton 8.58 50 X 29 X 41 5ML Centrifuge Tube With Screw Cap(cap Color Can Be chosen) Made from virgin polypropylene 2. Easy open and closing 3. Different colors can choose 4. Bulk Package, 100pcs/bag, 20bags/ctn