LOTTO 5 Attuatori Lineari Elettrici 12V 24 DC 6" 8" Tempi Solare Robotica Rc Robot
USED electric linear actuators. Most are 6" to 8" stroke. Reverse polarity(+/-) to change direction (extend/retract). They work with12-24v DC. Built in limit switches at end of travel. if you don't understand this do not buy.