Yes everything is included the ring, the post, a mounting bracket, screws and drywall anchors if needed.
Diameter: 6 inches (15.24 cm) From Wall: 2.5 inches ( 6.35 cm)
Not available in the store. Had to order on line and pick up.
You buy the posts separate and then the TP roll also sold separate to add to it.
The brushed is polish plated and not a true metal. The tint is lighter than non-polish metals.