These are the Cusco Front Pillow Ball Upper Mounts. These have been designed to allow the user to have more camber adjustment for your front suspension setup. These are made from 6mm aircraft grade aluminum materials and will come powder-coated in Cusco's flagship blue color. Once installed, they will help control unwanted forces under acceleration and braking. 

These will usually fit most coilover setups that don't come with top hats. You have to make sure that you use the same nut that either came with the shaft of the strut or use a nut with the same thread pitch. These top hats will come with M12 X 1.25 nuts for the top hat stud, and you can use it as long as it matches the thread pitch on the coilover shaft you are using. Otherwise, use the correct nut.