PROTECTION - This heavy duty bird feeder cage provides maximum resistance to larger birds, who may be unwanted garden guests to your wild bird food. Encourage many pretty garden birds closer to your house and watch them feed and play from your window or garden. USAGE - Easy design to hang from a branch, hook or designated feeding station hook, with easy access to refill simply unscrewing the top. ATTRACT - All kinds of garden birds to your bird feeders; Blue Tits, Great Tits, Nuthatch, Sparrows and many other small garden birds. DESIGN - Strong galvanised metal cage to deter squirrels & large birds, easy to fill with wild bird food. SIZES - From approximately 20.7 x 16.7cm (Oval feeder) 27 x 19.5cm (Premier feeder) 34 x 24cm (Larger Ultra feeder).