Finish on both idler pulley setups( fixed and adjustable) is zinc phosphate for the bracket and pulley bearing cap, pulley is semi gloss black...please also note those brackets are specific to 1968-69 models,as 70 used the larger bearing. The fixed pulley setup has the letters SPC stamped on bracket and the pulley has a small S stamped on the pulley face,the adjustable pulley setup has the same pulley and bearing(5/8 by 1 3/8 by 7/16)...while it's bracket can have a large S stamped on flat face or have no markings at all on face.