aluminum
アルミニウム
abstract
alloy
aluminium
backdrop
background
brushed
chrome
clean
cold
construction
cool
effect
gray
grey
grunge
industrial
industry
iron
light
machinery
material
metal
metallic
nickel
ore
polished
processed
refined
sheet
shiny
silver
smooth
smoothened
stainless
steel
strong
surface
texture
textured
tin
wallpaper