An engineering technology research centre for ultra- and UHV bushings that have passed the "laboratory certification" of the National Accreditation Service is located at Superior Stone Industries, along with testing facilities for insulators and high-voltage electrical products, a glass insulator engineering technology centre, and a centre for machinery industry machinery insulators. Oil-type, glass fibre, and glue-impregnated paper high-voltage capacitor bushings under the Raiden brand name are used in electrical engineering construction. In addition to being sold to more than 70 different nations and areas throughout the world, the items serve the home market.

Particularly, the insulators produced by Superior Stone Industries have been in production continuously since 1958, spanning more than 60 years. Over 100 million pieces have been sold collectively, covering half the nation and one-sixth of the entire planet. 24 UHV lines have already started using the items.