Our manufacturer is the most professional and the biggest post tensioning ducts supplier in China, and have been in this industry more than 20 years. It is same as the PT ducts manufactured by Spiro tube-former adopt 78mm width raw material. The post tensing tube-former is designed by our high engineer, till now we are still the exclusive one in china to supply this kind duct. And it is special for exporting. Especially The normal parameters about the ducts have been showed in the up form, still the special request can be made the negotiation. We have full ability to supply the custom post tensioning ducts according to client’s request with the advantage of our tube former machine design ability.