The Ikan FHS600 Filter Holder for S600D Light Fluorescent Fixture models is a filter frame designed for S600D fluorescent light fixtures--the frame allows you to attach a gel to it and slide the frame into the filter channel on the light.
Specifications:
Dimensions: 22.875" x 21.5" x 0.0625""
Weight: 0.80 lb (0.37 kg)