Description: Strong and durable The tool is simple & easy to use. Small size, light weight, especially for small equipment Slider could easily and lightly move; with steel ball holder/retainer Suitable for Semiconductor manufacturing equipment, printed circuit board IC assembly equipment, medical equipment; machine arm, precision measuring instruments, office automational equipment and other small linear sliding devices. Specification: Rolling bearing seat material: Bearing Steel Color: As pictures show Height (Block): Approx. 10mm/ 0.39inch Width (Block): Approx. 27mm/ 1.06inch Length(Block): Approx. 46mm/ 1.81inch Height (Rail): Approx. 8mm/ 0.31inch Width(Rail): Approx. 12mm/ 0.47inch Length(Rail): Approx. 550mm/ 21.65inch Package Includes: 1 Piece Miniature Guide Linear Slider Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement