Feeder seed trays reduce waste (and mess) & provide extra perching space on your bird feeders. They're made from tough polycarbonate, with drainage holes & are designed for use with our feeder pole or on hanging feeders. Particularly recommended for nyjer feeders. This large seed tray is specifically designed for all RSPB Classic, Ultimate Easy-clean®, Cheater® & Premium bird feeders too. Supplied with a large butterfly screw, which finger tightens to secure it to the bottom of RSPB Classic, Cheater®, Ultimate Easy-clean® & Premium feeders.