This is a fiber optic dual gooseneck Y-shape lights for microscope illuminators in mint condition. Each metal-sheathed light cable is 22 (560mm) long and can be bent into various positions. It has a 5/8 (16mm in diameter) adaptive plug for connecting to a light source. Features & Specifications: A Fiber Optic Y-shape lights for 150 Watt Fiber Optic Illuminator Providing Even Bright and Cool Illumination Dual 22 (560mm) long Cables 5/8 and 25/32 (16mm/20mm in diameter) Two-Step Adaptive Plug Durable Metal Construction Manufactured under ISO 9001 Standards