Sichuan Tianyi Group was established in 1986 focusing on Research & Development, Manufacture & Sales of wide range products including Heat Shrinkable Joint Closures for telephone cables, heat shrinkable sleeves (tubes), heat shrinkable water-proof caps for natural gas and petroleum pipelines as well as water pipelines, aerial cable jointing materials, optical & electronic Devices, ADSL Network Access Equipment, CDMA/GSM Repeater for Mobile Communication and in-building distribution system.