Railing posts include the following types: 

Compact 2" posts are often used as reinforcing posts, pillars of continuous railings, when homeowners like the seamlessness and lightness of the fence.

3" post is the most common post for railing posts, medium size, sturdy, used in all types of single handrail, open middle bar, finished...

The 4" pillar has a large size, often used as a main pillar, corner pillar, or integrated gate post.

The pillar that integrates the light and camera is customized in height and size to suit. Create unity and seamless integration of devices.