Version: Rainbow Dream Opti Kinetics Effect Wheel: stimulating or calming. The Opti Kinetics effect wheels, with their colorful gradients, can have either a stimulating or calming effect depending on the clientele. When combined with suitable music, the wheels promote relaxation. Product details: 6-inch effect wheel: ø 15 cm. The effect wheels are compatible with all Sport-Thieme projectors except for the Mathmos projector. The effect wheel is attached to a suitable projector with a screw on the motor. Material: high-quality tempered glass, rubber ring on the edge.