GE's manufactures g3 high voltage products as an alternative to SF6. These products are type-tested and available for live-tank circuit breakers and gas-insulated substations up to 145 kV, gas-insulated lines (GIL) up to 420 kV and instrument transformers up to 245 kV. In September 2019, GE also announced its roadmap to developed the complete g3 product portfolio through 2025.