abstract
alloy
aluminum
backdrop
background
blank
board
border
copyspace
design
frame
gray
grid
grunge
hard
heavy
hole
industrial
industry
iron
layout
mesh
metal
metallic
modern
nameplate
net
old
panel
pattern
plaque
plate
rectangle
round
rust
shape
sheet
sign
signboard
silver
space
steel
tablet
technology
template
texture
wall
wallpaper
zinc