These ball joint bodies are precision machined from billet aluminum. They have a lightened steel ball stud that features 5 radial and angular cut grease grooves for full lubrication. A nylon wear cup allows the cap to be adjusted with virtually no friction. They are available with stock length studs and studs up to 3/4" longer in 1/8" increments. They are easy to adjust and rebuild. "WARNING:This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm."