Irritrol's B-FLEX12-05 12" Flex Assembly comes from the Super Blue Flex Series. It has a 1/2" X 1/2" thread. It has a pressure rating of 25 - 75 PSI. Irritrol has made their name as a brand by selling and marketing exclusively to the professional installer, as a result their products are geared to be dependable and durable. Irrirtrol is now making their products available to you through our website. If you are looking for a product line that will last year in and year out, Irritrol is the brand for you.