Material: aluminum alloy Color : Red Choice: mm type (Metric) Number of tracks: 4 Overall length: 797MM  feature: The track can be spliced and the scale is clear. The track factory is 797MM, which is spliced by 4 sections: 197-497/497-797MM. To protect the track, the contact area of the lead screw is large, the wrench can pass through the lead screw to predict the position, and the track will not be damaged during operation. The position of the limiter can be adjusted at will.  Package Included: 2 x Main body bracket to attach the parallel guide system 4 x Laser scale dual purpose track 2 x 375MM Slider 4 x 17.8MM Slider 2 x 63MM Slider 2 x 153MM Slider 4 x M-16MM Screw 4 x M-10MM Screw 2 x plastic plug 2 x Stainless steel plug 1 x Phillips screwdriver 1 x Wrench 2 x Link board 4 x Limit stop