These are GNP's adjustable spherical endlinks are for mazda miata from 1990 on. For those demanding the ultimate in performance, these endlinks will act as a solid link between the shock tower and the sway bar, eliminating flex completely. 
GNP endlinks are designed and engineered to handle the stiffest aftermarket sway bars.  

The endlinks includes high misalignment spacers to allow a bind free connection, also, we include the rubber boots to keep the dirt out.
These endlinks are length adjustable to dial out preload in the sway bars to help get the most out of them.
GNP end links feature some of the highest quality components available
on the market.
 
Includes:
High strength grade 10.9 gold zinc plated bolts, hardware and standoff spacers
Aurora nylon/PTFE injection moulded, Teflon coated spherical bearings
Rubber boots
Everything is included that  you need will need for a easy installation