*2 sides, 3 sides and 4 sides low relaxation indented pc wire. *raw material:swrh 82b/swrh 77b wire rob ding custruction, water conservancy projects, railway sleepers, tunnels, frame of roofs, overhead crane beams, industrial and civil prefabricated concrete slabs, wall boards, tubular piles, pc water pipes, tv towers and so on. *advantage: > good fixed performance > steel wire cross-section area without any loss > reduce the length of transmission significantly > high strength, low relaxation Baling strip strapped, inner is water-proof plastic, outer is polypropylene wonven bag in coil, or according to the customers¡¦ requirements.