GENIE Garage Door Openers 37557R Chain Bullet Assembly GENIE Garage Door Openers Chain Bullet Assembly For use on IntelliG 1200, 4024, ChainMax 1200, 4022, Destiny 1200, 8030, SilentMax 1200, 4042 For use on IntelliG 1000, 3024, 3024H, ChainMax 1000, 3022, Odyssey 1000 and 7030