Quantity   Component name
8 × Speedaire 6W147 Pneumatic Cylinder 4" stroke, 1-1/2" bore, 250PSI max, 442LB at max pressure (http://www.grainger.com/product/SPEEDAIRE-Air-Cylinder-6W147)
1 × 1" x 1" Perforated Steel Tubing Strong, rigid, light.
1 × Festo 8-card valve bank Found at a surplus store for $70!
1 × Nuts and Bolts
1 × 3/4" Steel Box Tube (0.100 wall thickness)
1 × 1/4" Polyline