Blue GS6 Height Restriction Kits - Rail IndustryOur Blue height restriction kits are designed for the rail industry where red products are generally not allowed for fear of being mistaken for signals. In many ways, these kits are the same as their Standard GS6 Kit counterparts, with the colour being the only differentiating factor. These GS6 posts should be used either side of an overhead obstacle whilst construction work is being carried out. When installed in this way they act as a height