1967-72 GM A-body , F-body, X-body, B-body. These are the sealed plugs that go into the floor pans of the car the back area. There are 2 for the interior. These are held in with sealant. When your car was new the body was dipped into a black or red color dye and these holes in the floor and trunk allowed the fluid to drain. The covers then sealed over the holes. These are exact to the factory originals in the correct silver zinc plating Replacement for: 1967-72 A-body, , , , 1973-77 A-Body, , , , 1968-74 , 1971-74 , 73/74 , 1967-69 / 1970-81 / All GM Big Car & all GM from 67-77 These are the details that separate the first place cars from the rest.