Spacious circular seating comes with pre-assembled seats, backs (if you order the bench with back) & frames - just bolt together, and you're done with assembly.Seat/Back: Recycled plasticBenches install around any tree, fountain or planter up to 3.5 or 4' in diameterEnjoy a beautiful day on this unique bench under the shade of a treePerfect benches to showcase and enjoy your favorite trees!Spacious six-sided seating accommodates up to 12 peopleBackless bench has a 92" OD & 49" ID - encircles any object that is up to 4' in diameterBench with back has a 92" OD & 43.5" ID - encircles any object that is up to 3.5' in diameterPre-assembled seats, backs and frames bolt together easilyUV and moisture resistantRecycled plastic lasts a lifetime