abstract
alloy
aluminum
backdrop
background
blank
board
decorative
design
frame
grate
gray
grey
grid
grill
grille
grunge
hard
hole
holes
industrial
industry
iron
macro
mesh
metal
metallic
modern
net
panel
pattern
plate
profile
reflection
round
shape
sheet
shine
shiny
silver
sleek
smooth
stainless
steel
surface
technology
texture
tile
wall
wallpaper