Versatile, beautiful and functional. This 4 shelf system offers three lengths of shelves 20", 28" or 36". They can mix with our other 2 and 3 shelf open cherry sides. Simple Assembly - you don't need any tool but the assembly time will be around 5 minutes with a power hex head screwdriver. Solid Cherry Wood, no mdf, plywood or particle board. Cherry wood is a beautiful, living wood that darkens with light exposure, transforming into a rich reddish brown over time. We finish it with our All Natural Beeswax Polish (organic jojoba oil and local beeswax). Since this is a light finish, you will need to re-apply when it looks dry, at least annually.