Brackets, bases, stems, lenses and much more.
Lighting can come in a variety of different finishes. Finish acronyms are as follows:
AGZ - Aged Bronze / AZ - Architectural Bronze / AZT - Textured Architectural Bronze / BBR - Bronzed Brass / BK - Black / BKT - Textured Black / CBR - Centennial / CO - Copper / GRY - Grey / MST - Textured Midnight Spruce / OB - Olde Brick / OZ - Olde Bronze / SD - Textured Sand / SS - Stainless Steel / TZT - Textured Tannery Bronze / WH - White / WHT - Textured White.
Look here for finish swatches. *Not all fixtures are available in all finishes.