Electroporcelana Gamma S.A.S.

Colombia

Allied Insulators

United Kingdom

Sediver

France

Newell (A PGC Company)

United States

Norsk Teknisk Porselen Products AS

Norway

Pingxiang Huaci Insulators Group Co. Ltd.

China

Pingxiang Best Insulator Group Co., Ltd.

CHINA

Hivolt Power System

China

MacLean Power Systems

United States

Nanjing Electric Insulator Co.,Ltd

CHINA