Image Item No. Description  6589  Technic, Gear 12 Tooth Bevel Catalog: Parts: Technic, Gear  69762  Technic, Gear 14 Tooth Bevel Thick Catalog: Parts: Technic, Gear  6574  Technic, Gear Rack 1 x 2 with 2 Tow Ball Catalog: Parts: Technic, Gear  6585  Technic, Gearbox 4 x 4 x 1 2/3 Catalog: Parts: Technic, Gear