Check the listing for details. electric Linear screw Actuator 12V 24v 6" 550lbs/2500N 0.25"/s solar rc robot DC. Condition: Used. Listed at 14.50 USD. One screw style DC Electric Linear actuator Stroke Travel is ABOUT 6" There are no limit switches, so you would have to wire in external limit switches or mechanical stops or just use a momentary button. Mounting locations are interesting, the top has 6 holes that work nice with basic flat head screws, the bottom has 2 M6x1.0 threaded holes. Weight is 3-1/2 lbs 2500N rating (562LBS) Treaded rod appears to be some sort of acme thread? .465" Diameter. Rated for 24v DC but runs fine on 12v as well with reduced speed Max amp rating is 4.5A No load travel speed 24V - about 1/4"/SEC 12v - about 1/8"/SEC All Steel construction. The moveable threaded nut section can also be removed and use it as a small DC gear motor and attach to the threaded rod. 10% duty cycle 2mins/18mins Quantity discounts on multiple. Feel free to ask any questions you may have and Thanks for looking!