There are many different types of security fences available on the market, each designed to provide a different level of security. The most common type of security fence is the chain link fence, which is typically used in commercial and industrial applications. Chain link fences are made from steel or aluminum and can be either galvanized or coated to resist corrosion. They are usually 6 feet tall and have a mesh size of 2-3 inches. Another type of security fence is the welded wire fence, which is also made from steel or aluminum. Welded wire fences are usually 8 feet tall and have a mesh size of 2-4 inches. These fences are usually used in residential applications. Source Link: https://www.dukeswiremesh.com/product/plain-steel-expanded-metal/ http://connect.releasewire.com/company/dukes-wire-mesh-supply-services-ltd-260479.htm