This is a fiber optic ring illuminator in mint condition. Its top window design is convenient for changing bulbs. Its auto-shut-off mechanism will cut off electricity automatically when the window is open. The illuminator comes with a 35" (890mm) metal-sheathed light cable. The ring light is 150Watt with 2-1/8" (56mm) inside diameter and 3-1/8" (80mm) outside diameter. It is fully adjustable in intensity. The light source is a 110V unit with solid-state controls and a two-step, 5/8" and 25/32" (16mm and 20mm in diameter), adaptive hole for the fiber optic cable. This cool high intensity lighting system is excellent for biological and electronic applications. Features Specifications : 150 Watt Halogen Variable Intensity Fiber Optic Light Source Convenient Top Window Design for Changing Bulbs Auto-Shut-Off Mechanism for Electrical Safety Great for Discriminating Lighting Perfect for Evenly Illuminating a Specimen without Heating 35" (890mm) Long Metal-sheathed Light Cable Light Ring with 2-1/8" (56mm) Inside Diameter and 3-1/8" (80mm) Outside Diameter 5/8" and 25/32" (16mm and 20mm in diameter) Two-step Adaptive Connection Full Adjustable Intensity High Intensity 24V/150W Quartz Halogen Bulb Forced Air Cooling System 3200 Degrees Kelvin Lamp Color Temperature Durable Metal Construction Manufactured under ISO 9001 Standards Packing List : One 150W Halogen Light Source One O-Shape Fiber Optic Lamp One Power Cord Two Spare Fuses Shipping Weight: 15 lbs