Variety for all applications Wide variety of frames to cover different applications;Interchangable trims to cover desired lighting effect;Designed for ease of installation For all Non-IC applications in both residential and commercial construction. Accepts all 1000's series trims. Rugged mounting system with 13" heavy-guage mounting bars that extend to 27". Integral cable clamps. Available in three well-scaled sizes: 3 3/4", 5", 6 3/4";Righting mounting frame does not flex, keeps reflector trim flush to the ceiling;Rotatable mounting bars enables frame to mounted in tight conditions;Allignment markings make it easy to keep a long run of downlights straight Residential;Hospitality