Ceiling Light&Ceiling Light&ceiling down light&lighting Features: 1.Material: Pure aluminum of high quality, made by precise digital-controlled machine; electroplating surface and resist high temperature and rust strongly. No discoloring or distortion for long time.2.Inner and outer ring with screw structure match closely, disconnect or install and change light source easily. 3.According to different places and requirements of illumination angles, there are single cell, doubleceils and triple cells for option. Single cell and double cells are not adjustable, while triple cells are adjustable. The three types are exchangeable. All kinds of inner and outer rings can match with each other freely to become different styles to meet different requirements.