won't allow a direct link to the product unfortunately so here is the copy/pasted info from the website:
UAS Pivoting Upper Front Adjustable Control Arms. Designed by V8 Supercar and Automotive Engineers. Stress tested.
Made from 4110 and 2110 Chrome Molly,Tig Welded, Zinc plated, alloy spacers, Japanese NSK bearings.
25mm adjustment, Race minimum 150mm, Road -Race 165mm and Road 175mm. Factory is 185mm bolt centre to bolt centre.
Note: Suspension and steering works better as unrestricted, and they don't ware unlike factory and all other aftermarket control arms.