Norsk Teknisk Porselen Products AS
Norway
Dalian Insulator Group T&D Co., Ltd
China
PPC Insulators
Austria
Zapel S.A.
Poland
Modern Insulators
India
Insulators & Electricals Company (Prop. Hindusthan Urban Infrastructure Ltd.)
Hivolt Power System
Sinoma Jiangxi Insulator and Electricity Co,. Ltd
Newell (A PGC Company)
United States
LAPP Insulators GmbH
Germany
PFISTERER
Allied Insulators
United Kingdom
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