I purchased this product along with the Presto 01781 23 quart canner. I have been wanting to get a new canner for a few years, but was leary about using the dial gauges (I had been using my Mothers Mirro weighted gauge canner). After reading reviews of the Presto 01781, I discovered that this pressure regulator was available, which turns your dial gauge canner into a weighted gauge as well! It works perfectly! I don't have to constantly check the dial, as long as I hear the gentle rocking of the regulator, I know that the pressure is perfect. This product is a definite necessity for the Presto 23 quart canner. And, at right around $10, a steal considering all the time it has/will save me.