4mm 30 Gauge Gi Soft Hardness Cold Rolled Hot Dipped Iron Plate Galvanized High Carbon Steel Plain Sheet - China Carbon Steel Sheet, Carbon Steel Sheet Roll | Made-in-China.com
WOODWARD FAB, US Sheet Metal, #30 to #0 Gauge Range, Sheet Metal Thickness Gauge - 30NX67|WFSG - Grainger
Imperial 4-in x 30-in Galvanized Steel Round Pipe, 30 Gauge | The Home Depot Canada