All Erva pot rings were developed to fit Pennington Brand clay pots perfectly. A 12" Penningtion Pot fits perfectly into the PR12SDW 11.375" actual exact Inside Diameter. Other brands vary slightly but will also fit in the ring. 

Erva's SDW Series pot rings feature a heavy duty bracket that clamps to a 1" to 1-1/2" round or square vertical porch or deck baluster. 2 Screws secure the bracket in place. Erva pot rings are all built to an exacting standard with extra heavy duty components and are guaranteed not to sag under the weight of a fully hydrated pot.

The sturdy ring is made with 3/8" wire. The clamp is made from 12 Gage steel and MIG welded to the stem of the ring. It' extends 2" from the baluster. Powdercoated back. 

Made in USA with all American made materials.