ZoneFirst Trolex Corporation invented and patented the most successful selling line of motorized dampers in 1964. Today that tradition continues by leading the industry in manufacturing self contained manual and automatic air control dampers for the OEM market. Trolex has sold millions of dampers since 1964 and continues to outsell and lead the market place with affordable, high quality damper products that last. Trolex supplies dampers to the leading OEMs and provides high quality products and quick turnaround. Whether your damper needs are small or large, Trolex is ready to serve your needs. Let us show you how we can perform for you.