Ensure you're Ready for the Road Ahead with the Fontaine No-Slack 7000 Series Left-Hand Release Air Actuated Cast Top Plate, an ultra efficient trailer coupling and uncoupling system. Thanks to a cast steel housing, each top plate offers exceptional chemical and corrosion resistance, while maintaining remarkable strength and durability. Designed with meticulous standards, and tested with rigorous requirements to meet even the most challenging of road conditions. FleetPride is your First Click in Heavy Duty .