Galvanised grit hopper with lid
Drilled holes in the base ensures no water is kept which may breakdown the soluble calcium in oystershell grit.
Comes with 4 metal clips so you can attach to a metal cage front (just cut out a hole in the wire for the birds to access the grit)
Also suitable for an in-house feeder if screwed to the wall (metal drill bit needed)
All zinc construction.