There is a utilities yard that I sometimes go to, where on occasion they have good stuff. Last fall I found this string of white porcelain 13 inch NGk discs with the largest of hardware - a 2 inch ball. Do not confuse this with the smaller 1 3/4 inch ball which seems big compare to the normal everyday 1 3/8 inch that everybody has seen. These are big just palin big! They are new, unused still crated, . These are the heaviest suspensions I have found to date.