Welded Wire Mesh 2" x 2" x 0.187" – Des Moines Steel Inc.
Hillman 2.75-in Silver Square Wire Lock Pin/Clip in the Specialty Fasteners & Fastener Kits department at Lowes.com
Copper Square Wire Five Feet - Multiple Sizes
Fencer Wire 1/2 in. x 2 ft. x 100 ft. 19-Gauge Hardware Cloth, Galvanized Welded Cage Wire Poultry Netting Square Chicken Fencing CA19-2X100MF12@HD - The Home Depot