This is an Everflow Supplies tray with a standard runs assortment of nipples. In particular, the nipples have a diameter of 3/4 inch, and are made of galvanized steel pipe, with a Schedule 40 pipe wall thickness. Furthermore, the set contains one piece of each length, ranging from 1-1/2 inch to 6 inch, with increments of a 1/2 inch, including a close nipple, which makes a TOTAL of 11 pieces. In addition, these fittings meet or exceed the applicable ASTM and ANSI standards.