4.5" x 16" offset chine RID (reduced inner diameter, CIH style)gauge wheel assembly with a 5/8" bore bearing. This is a nylon/steel assembly with many applications. Can be used on all Kinze planters 2000 and later, CIH SDX30 and SDX40 air seeders, CIH 1200 series planters, White 8000 series planters.