... ,color clear 2.very smoothy ,can't see any track bronze aluminum extrusions ,matte surface ,mechanical polishedFeatures: 1. Alloy of ... extrusions : 6063 or 6061 2. Polish extrusions color : Silver, champagne, bronze, golden ,etc.3. mechanical polishing of extrusions : Firstly cancle rude ... it is very popular in Iraq market. aluminum extrusions/extrusion ,bronze color ,matt surface ( machine polished )