Feeder Guardians are available in packs, which include a modified feeder. The feeder cap, which can be accessed by squirrels, is made of strong metal alloy, for greater protection. To keep prices down, the base (and the ports on the seed versions) are made of plastic as these can't be reached by squirrels.
Pack Sizes
Small Feeder Guardian Pack - feeder height 24cm (9.5") diameter at widest point 25cm (9.8")
Medium Feeder Guardian Pack - feeder height 39cm (15.4") diameter at widest point 25cm (9.8")
