Waste Tube Guide Assembly, Includes both clamps, coiled tubing and hardware. This is the complete assembly including hardware and installation instructions needed to install it on a Dr. Oligo 96, 192, 384 and 768. All Dr. Oligo plate instruments shipped before December 1, 2014 had a waste tube guide that was attached to the left side of the instrument base plate. Many customers have had issues with this design therefore we have changed the design. This new waste guide assembly can be installed on to any Dr. Oligo plate based instrument.