These are to fit the 5 1/8" inside diameter, black in color and are held in place by a steel worm clamp. Price is per each.There were two styles, and this one is plain with no dividers. Make sure you check yours before ordering. Orders accepted online (preferred), or by phone toll-free 1-877-253-7882 or email email@example.com. If you have questions about which one you have, send us an inside photo of yours. Not genuine SJE caps and no returns.