Each electrical company will make the list of insulators. Such as list of insulators price, list of insulators size, list of insulators voltage, list of insulators mechanical strength and list of insulators technic parameters etc.

About list of insulators voltage:
Composite or Porcelain line post insulator voltage: 10kV, 11kV, 22kV, 33kV, 66kV, 69kV, 72kV, 115kV, 132kV
Composite or Porcelain pin post insulator voltage: 10kV, 11kV/12kV, 22kV/24kV, 33kV/36kV, 15kV, 25kV, 35kV
Composite or Porcelain pin type insulator voltage: 10kV, 11kV/12kV, 22kV/24kV, 33kV/36kV, 15kV, 25kV, 35kV

Composite or Porcelain suspension insulator voltage: 10kV, 11kV, 22kV, 33kV, 66kV, 69kV, 72kV, 115kV, 110KV, 220KV, 230KV, 330kV, 400KV, 500KV

About list of insulators, line post insulator properties:
Orient vertical clamp top line post insulators are mounted upright on crossarms and structures. Rated at 2800 lb. cantilever strength these insulators offer strength with excellent mechanical as well as electrical characteristics.

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