Plate Special 16 x 16 x 2/3 with Eight Recessed Edges with 1 x 4 Studs and Four Recessed Centers with 2 x 4 Studs

Plate 1 x 2 Technic Pin 1/2 with Friction Plate 1 x 4 Tile 1 x 8 with Groove Plate Round 1 x 1 with Open Stud Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Plate 1 x 1 Tile 1 x 6 with Groove Bracket 1 x 2 - 2 x 2 Inverted Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Tile Round 1 x 1 Quarter Brick Sloped 45° 2 x 1 with 2/3 Inverted Cutout and no stud