Centrifuge tubes are designed for centrifuges and machines to spin samples. Features: 1. Made of virgin polypropylene with high transparency. 2. With different packing. 3. Clear white or black graduation on tubes, large white writing area for easy marking. 4. Sterile or non-sterile. 5. DNA and RNA free types are available. 50ml self-standing bottom with screw cap 50ml self-standing bottom with screw cap 50ml self-standing bottom with screw cap 50ml self-standing bottom with screw cap 50ml self-standing bottom with screw cap, with black graduation 50ml self-standing bottom with screw cap, with black graduation 50ml self-standing bottom with screw cap, with black graduation 50ml self-standing bottom with screw cap, with black graduation 50ml flat bottom with screw cap 50ml conical bottom with screw cap 50ml conical bottom with screw cap 50ml conical bottom with screw cap 50ml conical bottom with screw cap 50ml conical bottom with screw cap, with black graduation 50ml conical bottom with screw cap, with black graduation 50ml conical bottom with screw cap, with black graduation 50ml conical bottom with screw cap, with black graduation