Preformed Coconut Liner The preformed coconut liner keeps your window box neat and tidy inside, and connects it to nature outside. These coco liners create a ���down-to-earth" feel and enhance the planters�۪ connection with nature. They keep the aesthetic design of the planters from being spoiled by unsightly roots and dirt, but still produce the effect of a natural growing environment. Perfect Match These preformed Coco-fiber liners are made to drop right into your existing window box. Dimensional Considerations This liner will fit the 36" Traditional Wall Trough / Window Box which measures approximately 36" Long x 7" Wide x 7" Deep Important Please measure your existing window box to ensure that these liners will fit. How Sold These Coco Liners are sold only as a set of 2