And Ill add. They are WAY over priced for what you get, speaking from my standpoint, lathe on hand. If you have a lathe or a buddy has one make you own. With better delrin too. Research Delrin AF. It has alot of the strength of delrin but with lower friction. Its a better material for suspension joints. They may use it but I doubt it cause they dont specify the use of it. And cost may have something to do with that. JR