Ergonomic - Angle tube racks at 25°, 35° or 45° to optimize visual and pipetting comfort. Instant Setup/Adjustment - Support base grooves allow user to quickly switch between viewing angles. Self-Stabilizing - Easel’s full width rests directly on benchtop at all angles to increase overall tube rack stability. Easy To Use - Simply pick an angle, place the easel in the base and start pipetting.