This kit comes with all the pieces to build a linear actuator entirely out of goBILDA® components. The 1120 Series U-Channel serves as the outside framework and the 1109 Series goRAIL® as the extension tube. The goRAIL® is supported by a pair of goRAIL® Slide-Blocks that can be mounted anywhere along the channel, changing the overall extension length and amount of lateral support they provide. The 60 tooth gear on the motor drives the 60 tooth gear mounted to the lead screw to create a compact 1:1 ratio.