The Strata 17375 Ring Pendant by Ultralights will add layers of style and design to your lighting theme. Two separate finishes all you to define the look and feel of this fixture. Accompanying these finishes and rivet details are Opal Acrylic top and bottom diffusers that expertly distribute light smoothly and evenly to the room. Dimmable with a 0-10V dimmer (not included). Height adjustable at installation. UltraLights Lighting, founded in 1988, stays true to their promise to create high quality, hand crafted and unique lighting products that stand the test of time.