Roman Ornamotor II Rotating Ornament Motor Hook, Set of 3 Set of 3 ornament motors for 360-degree rotating display Motors powered by Christmas tree lights; easy plug into empty light bulb socket UL listed for indoor use; accommodates most 35-, 50-, and 100-light strings For ornaments up to 1-1/2 ounces in weight only; ornaments not included Each measures 3/4 inch in diameter by 1-1/2 inches high with a 4-1/2-inch cord