Image Item No. Description By  32311  Technic, Arm 1 x 7 x 3 with Gear Ends Catalog: Parts: Technic, Gear 1  3647  Technic, Gear 8 Tooth Catalog: Parts: Technic, Gear 1  10928  Technic, Gear 8 Tooth with Dual Face Catalog: Parts: Technic, Gear 1  32270  Technic, Gear 12 Tooth Double Bevel Catalog: Parts: Technic, Gear 1  94925  Technic, Gear 16 Tooth - Axle Hole with Closed Sides Catalog: Parts: Technic, Gear 1