Ball Bearing Slide: Keyboard SlideMaterial: steel, zinc plated or paintedWidth: 27 mmThickness: 1.0mm (1.0*1.0)Length: 250 600mm Colour: according to customer's request (white zinc, yellow zinc, black) Carrying capacity: 18kg 25kg Packing: according to the requirement from customer (normally 30sets/ctn export carton)If you need more details, please contact us. We would very pleasure to tell you.