Mount the 30" Garden Gate Cage to window frames and create instant curb appeal. This charming window box cage and liner combination is made from steel and sold standard with a white cellular PVC insert. Cages may also be paired with a real copper, or powder-coated galvanized metal insert for a respective additional charge. Each steel planter cage measures 31"L x 9"W x 9"H and is finished in a rust-resistant, black powder coating. Quality-grade materials and impeccable design ensure many seasons of attractive container gardening. Steel window box cages are fitted with mounting straps for easy hanging (mounting hardware not included).