Package included:<br />1 x SBR12-600mm Rail Support<br />2 x SBR12UU Block<br /><br />Specifications:<br />Item: SBR linear guide， (with aluminum base)<br />Material: 45# steel + aluminum base<br />Linear rail length: 600mm <br />Color: Silver<br /><br />Feature:<br />Stainless steel Linear optical axis guide bearings linear movement. <br />With corrosion-resistant， high strength， wear resistance and so on.<br />Easy to install， no need to maintenance.<br />Suitable for installation on all kinds of machinery; such as: engraving machine， woodworking machinery， printing machinery， machinery， etc.