Description: 100-1000mm Linear Rail Guide with MGW12H Linear Sliding Guide Block CNC Parts. Specification: Material: Bearing steel. Size: 100/200/300/400/500/600/700/800/900/1000mm. Quantity: 1pcs. Features: -Good quality at a rock-bottom price. -Strong and durable. -The tool is simple and easy to use. -Beautifully designed. -Professional and technical. -Small size, light weight, especially for small equipment. -Slider could easily and lightly move. -With steel ball holder/retainer. Fit for: Semiconductor manufacturing equipment; printed circuit board IC assembly equipment; medical equipment; machine arm; precision measuring instruments; office automational equipment; other small linear sliding devices. Note: Please note that the package includes one single linear block or one size set. You can choose the length you would like. Package Included: 1 x Linear Rail Guide. 1 x Linear Block. or 1 x Linear Block