Image Item No. Description By  10928  Technic, Gear 8 Tooth with Dual Face Catalog: Parts: Technic, Gear 1  11955  Technic, Gear 8 Tooth with Dual Face without Friction Catalog: Parts: Technic, Gear 1  3648  Technic, Gear 24 Tooth with 1 Axle Hole Catalog: Parts: Technic, Gear 1  3649  Technic, Gear 40 Tooth Catalog: Parts: Technic, Gear 1