"""These lightweight, precision fabricated rotors are pre-balanced to ensure reliable
high-speed performance in your StatSpin centrifuge. Increase efficiency and avoid
downtime by always having an extra rotor on hand! RH12 12 x Hematocrit Tube Rotor with Transparent Screw-on Lid (with reader) 1 00-RING Replacement Rotor Holder O-Rings 1"""