1. Iron rails: (1) Due to the special nature of the metal, rust, environmental impact; cast iron is easily broken, the impact is weak. (2) paints, color easy to fall off, need annual maintenance, its high maintenance costs. (3) Notwithstanding the ancient traditional sense, but the lack of warm feeling. (4) installation, maintenance extremely inconvenient. 2. Stainless steel guardrail: (1) connection is not ideal, often due to welding intensity is not high, resulting in shedding influence firm. (2) the relationship between the wall thickness is often a by shock, deformation, distortion. (3) finish easily lost, affecting appearance and elegant. (4) the price is not the Philippines, and maintenance inconvenient. 3.PVC Lawn fence: (1) PVC lawn fence made of special PVC material, environmental pollution, corrosion resistance, strong and durable, never fade, blistering, peeling, cracking, spalling. (2) PVC lawn fence socket type connections, columns, rail and important parts are lined with galvanized steel reinforced, security more secure. (3) PVC lawn fence protection, maintenance and upscale, beautiful, durable, noble and modern atmosphere for the city, to add luster to the room, give you a new fashion concept. (4) PVC lawn fence Installation is simple, fast, long life, but not much different than traditional guardrail on prices.