Image Item No. Description By  11955  Technic, Gear 8 Tooth with Dual Face without Friction Catalog: Parts: Technic, Gear 1  6589  Technic, Gear 12 Tooth Bevel Catalog: Parts: Technic, Gear 3  32270  Technic, Gear 12 Tooth Double Bevel Catalog: Parts: Technic, Gear 3  94925  Technic, Gear 16 Tooth - Axle Hole with Closed Sides Catalog: Parts: Technic, Gear 1  3650b  Technic, Gear 24 Tooth Crown - Reinforced Catalog: Parts: Technic, Gear 2  3648  Technic, Gear 24 Tooth with 1 Axle Hole Catalog: Parts: Technic, Gear 2  3743  Technic, Gear Rack 1 x 4 Catalog: Parts: Technic, Gear 2  87761  Technic, Gear Rack 1 x 7 with Axle and Pin Holes Catalog: Parts: Technic, Gear 1