Image Item No. Description  3668  Technic, Brick 2 x 6 x 1 1/3 with Axle Holes and Bottom Stud Holders Catalog: Parts: Technic, Brick  3487  Technic, Brick 8 x 10 x 2 with 6 x 10 Recessed Center and 2 Pin Holes on each Side Catalog: Parts: Technic, Brick