Grimm OffRoad's uniball cap cover set is designed to seal the top side of the uniball in Grimm OffRoad Upper Control Arms to prevent contaminants from damaging or prematurely wearing the uniball joint. Caps work exclusively with Grimm OffRoad Upper Control Arms that use uniball joints. Protects Upper Control Arms from collecting dirt, mud, & road grime on top of the uniball joint which can damage the PTFE liner of the uniball Includes two 6061 CNC-machined billet aluminum caps Black anodized with laser etched Grimm OffRoad mountain logo Includes two sets of 3M neoprene adhesive rings to allow servicing Limited Lifetime Warranty Made in the USA