Features:This linear rail and block are small in size andlightweight, especially suitable for small equipments. Adopting 4-point contact design, it canbear load from every direction, and has good strength and high accuracy. Designed with ball retainer, which allowsinterchangeability in the case of small precision. Block has lubrication system; lubrication oil canbe easily put into the oil inlet on the side. Widely used for automatic equipment,precision measuring equipment, and many other machines that need precisionlinear movement. Specifications:Model: LML12BType: Slide rail Slide Track: Linear rail Rail Length: 100mm,150mm,200mm,300mm,450mm (Optional) Rail Width: 12mmMaterial: Bearing steelBlock Fixation Method: LockedWeight: 102~335g(approx.) Package Includes:1 x Linear Guide Rail 1 x Linear Guide Block Note:Please allow small size error due to manual measurement. Thanks for your understanding.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..