It supports two sizes of glass thickness 3/8” and 1/2”. The pictures are showing 1/2” glass.
The recommended distance between the posts is 5ft maximum for 1/2“ glass thickness and 4ft maximum for 3/8” glass thickness.
Our stock sizes are 36” and 42” high posts. When a top rail is needed, a pyramid handrail bracket (adjustable for stairs) can be mounted on top. Custom sizes are available at comparable prices.