2 pcs 4 Inch 4" Stroke Linear Actuator 12 Volt 12V 225 Pounds lbs Maximum Lift

Description: Retracted length: 8.13"(205mm) Extended length: 12.13(305mm) Diameter of Mounting hole: 0.256"(6.5mm) Diameter of Shaft: 0.79"(20mm) Linear actuators are actuators which create motion in a straight line.Unlike a motor, which creates circular motion, a linear actuator can be used with any application that requires moving something in a straight line.Demotor Linear Actuators are a powerful and reliable linear actuator for small to medium loads. We designed our linear actuator with pre-lubricated metal gears, pre-installed limit switches, and with an IP65 (suitable for outdoor use) water resistance rating. Note:Professional Installation is Highly Recommended (No Instruction and Wiring Diagram Included)Comes with all items in the picture.