This website mainly talks about porcelain line post insulator and porcelain pin post insulator as main types of electrical insulators.

Electrical insulators for porcelain line post insulator design:
Designed for upright or angle mounting on a crossarm, a choice of stud assemblies is available for both wood and steel crossarms. All Line Post Insulators are manufactured by Orient Insulators in strict compliance to ANSI standards.

Electrical insulators for porcelain line post insulator specifications:
- Available in both horizontal and vertical trunnion
- Horizontal used for applications such as down-leads and jumper loop control
- Vertical used for applications such as crossarms and structures
- Manufactured and tested to ANSI Standard C29.7

Electrical insulators for Porcelain pin post insulator design
The porcelain pin post insulator is a unique design, combining the advantages of the line post insulator with the advantages of the pin type insulator.

Electrical insulators for ceramic pin post insulator properties:
These insulators offer an economical alternative to line post insulators (fitting on the same mounting pins as pin type insulators) while providing the improved operating characteristics of line posts - more rugged construction, improved resistance to lightning impulse damage, and standard ANSI threaded pin holes. 

Relative Articles:
◆ANSI class 57-2 line post type insulator
◆Porcelain line post type insulator
◆66KV porcelain line post insulators
◆Porcelain power line insulators
◆ANSI insulator