The Angle-Lok Reflective system has been widely used in many State Departments of Transportation. It offers only sound transmission loss acoustical principals.The standard ANGLE-LOK Reflective Panel has a sound transmission class value of at least STC 22.
It is aesthetically pleasing and cost effective. Its light weight design makes it easy to install and affordable. Check out the Angle-Lok Spec page to get a more technical feel for this highly proclaimed system.