Image Item No. Description By  71076  Brick, Round 1 x 1 d. 90 degrees Elbow Macaroni - No Stud - Type 1 Catalog: Parts: Brick, Round 1  71075  Brick, Round 1 x 1 x 1 2/3 Catalog: Parts: Brick, Round 16  6222  Brick, Round 4 x 4 with 4 Side Pin Holes and Center Axle Hole Catalog: Parts: Brick, Round 4