Stuffing Boxes Features : Available in single or dual pack. Cap, Glands, Body and Base made of Grade 65-45-12 ductile iron API gauged threads Bottom threads available in API tubing [EUE] or LP [line pipe] Built-in misaligning feature Available for rod sizes 1″, 1-1/8″, 1-1/4″, 1-1/2″, and 1-3/4″