Irritrol's SL417 4" Pop-Up Sprinkler with VAN comes from the SL Series. It has a 1/2" FNPT thread. It features a 4" pop-up height. It has a adjustable spray arc. The SL417 has a 17' radius. It has a pressure rating of 20 - 50 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.