Different country, may have different climates. end users should choose the best fence to compliance to climate.
For example, Europe, as usual the climate is moderate, not too cold or hot, so the fence with thin wire( such as 4mm ) is one of your best choice. The cover of plastic will not crack or drop off; What's more, the wind in Europe is usually small. 4mm wire is strong enough to withstand the wind.
However, in some country, such as Russia. Climate is severe and weather is bad. In most area of Russia, it has a long period, even over 1/3 of the whole year. In winter, the temperature is frigid, even 40-60 degree. So if the wire thickness is thin, the steel maybe can not withstand the freezing. And the plastic, must be high quality, or it will be very easy to crack or drop off.
As a sales of fence, this is a basic knowledge. So when customers from different countries send inquiries, if customers are not sure about their requested, you should advise the best choice for them to earn their trust. Your experience and knowledge can help you get more orders instead of missing the opportunities.