General description Attaching to the bottom of seed feeders, these trays will catch all the seeds and seed casings that are discarded or dropped as the birds feed. Helping to keep lawns or flowerbeds clear of debris, the trays also act as a secondary feeding platform for birds to feed on. Technical specifications Diameter: 20 cm Set of 4 trays Connecting bolts included Drainage holes in base Compatibility and accessories Compatible with feeders that have a 2 cm screw-in attachment Only compatible with the GFK611 Premium Feeder with Aluminium Lid and Base Installation Easy to attach with connecting bolts Simple to remove for cleaning