QA1 Ball joints are ultimate patented ball joints that are 100 percent rebuildable. In case you need a new replacement ball joint housing, QA1 has you covered. QA1 replacement ball joint housings are made from the same high quality material as the originals to ensure the same performance you expect from your QA1 products. Specifications: Dimensions: 4.55 x 1.91 x 1.91 inches.