Image Item No. Description  73230  Technic, Brick 1 x 1 with Axle Hole Catalog: Parts: Technic, Brick  3700  Technic, Brick 1 x 2 with Hole Catalog: Parts: Technic, Brick  39789  Technic, Brick 2 x 4 with 3 Axle Holes Catalog: Parts: Technic, Brick