MPC LAD-B8-BK Heavy Duty Linear Actuator, 12V, 225 lb., 8" Stroke Black Finish Heavy duty linear actuator with 8 inch travel 225 lb max static load; 112 lb max dynamic load Overall Length: 12.75" (Min) to 20.75"(Max); Length Between Mounting Holes: 12" (Min) to 20"(Max) Perfect for operating tonneau covers, motorized trunks & hoods, amp racks and whatever else you may imagine! We have actuator wiring/switch kits available separately on Amazon!