These rod end seals are a neoprene rubber seal bonded to an aircraft quality washer. Extends the life of your rod ends by keeping the dirt, debris and moisture out of the spherical ball. They fit on both sides of the ball end of the heim joint and are sized to match the hole in the spherical ball. For use with standard and Pro 1 Series rod end only. Sold in sets of six, which will cover both sides of three rod ends.