Image Item No. Description  18940pb02a  Technic, Gear Rack 1 x 14 x 2 Housing with Black and Yellow Danger Stripes Pattern 1 (Sticker) - Set 42070 Catalog: Parts: Technic, Gear  18940pb02b  Technic, Gear Rack 1 x 14 x 2 Housing with Black and Yellow Danger Stripes Pattern 2 (Sticker) - Set 42070 Catalog: Parts: Technic, Gear  27938  Technic, Gear Worm Screw, Short Catalog: Parts: Technic, Gear