MPC LAD-HS4 High Speed Linear Actuator, 12V, 4" Stroke, 65 mm/sec, 45 lb. Load Rating High speed linear actuator with 4 inch travel Speed: 65 mm/sec; Max Load: 45 lb. Overall Length: 13.5" (Min) to 17.5"(Max); Length Between Mounting Holes: 12.75" (Min) to 16.75"(Max) Example Industrial or Commercial Applications: Solar Power, Farming equipment, road maintenance, construction work, military, yachts, ships, Oil platforms, trains, mining equipment, food industry.