WFBS plastic-wrapped flex fire-retardant balance compensating chain is made of best welding chain, and the surface plated or anti-rust treated, is wrapped by synthetic PVC, and then processed by special workmanship, so the product will have a best character of flexibility, fire-resist, wear-resist, small curvation radius, almost no noise. It can be used in the temperature of -15 +60,elevator speed less than 1.75m/s, and used widely for view-looking elevator Model No. Unit Weight(kg/m)Allowed least curvation Dia(mm)Broken load(≥KN)WFBS φ 60.89±0.222013.32WFBS φ 71.28±0.224018.13WFBS φ 81.50±0.226023.68WFBS φ 92.03±0.228029.97WFBS φ 102.39±0.228037.00WFBS φ 112.95±0.230044.70WFBS φ 123.33±0.230052.00WFBS φ 133.80±0.232063.00WFBS φ 144.90±0.232069.90WFBS φ 166.15±0.234094.72