Products / Dock Equipment / Truck Restraint / Serco / Serco SL40 Series Mechanical Vehicle Restraint Serco SL40 Series Mechanical Vehicle Restraint The Serco SL40 is a manually operated vehicle restraint system like the SL20, but the SL40 automatically senses the actual contact between the restraint and the vehicle’s rear impact guard and communicates its status via interior and exterior red/green LED lights. The control bar allows for easy manual activation and release. The SL40 provides exceptional value and a low cost of ownership. Contact us Related products Serco SL60 Series Powered Vehicle RestraintSerco SL60 Series vehicle restraints provide automatic pu… Serco SL20 Series Mechanical Vehicle RestraintThe manually operated Serco SL20 vehicle restraint system… Serco SL10 Series Mechanical Vehicle RestraintThe manually operated Serco SL10 vehicle restraint is a b…