8-130 Insulated Swivels, With Half Link & Web Sling Connectors.绝缘旋转钩（带半环和吊带连接件） Design factor 4:1 proof tested and certified Tested acc to EN 1677:2000安全荷重设计系数4:1测试通过，根据EN1677:2000条件测试 Inpidually tested to resist 1500 Volts insulated with Test Certificate.Design for protection of overhead crane during welding operations on suspended loads.绝缘旋转环（Insulaed Swivels），能防御1500伏高压电，带检测证书，设计用于在对悬空货物进行电焊操作时，保护高空起重机。