This retrofit kit is a steel frame that rests on the T-BAR ceiling with the troffer on top of it. The desired lens can be installed in the drop down door. This will replace the original door that is missing from a fixture.
This retrofit kit is a 3" deep Parabolic Aluminum Retrofit Kit that is installed between an existing fixture and the T-bar ceiling .There are a variety of cell configurations to match most original louvres. They come in 2x2 and 2x4 sizes.