We've figured everything out for you with our Camburg uniball kits. You just need to select the uniball and bolt size you want to use. These kits use FK uniballs, our 4130 chromoly fully machined cups, our heat-treated stainless steel mis-alignment spacers and the matching snap ring. Everything is Made in the USA and not some cheap imports. Use these to build upper or lower control arms, spindles, trailing arms, etc. Refer to the diagrams for sizing, spacer spread and degrees of movement. The 1.00" kits use the AIN series bearing and the 1.25" and 1.50" use the COMH series. All have a PTFE Teflon liner.