8440 Garden walls (4) 8441 Masonry landscape walls (6) Posts and walling of brick, concrete blockwork and natural and reconstructed stone 8442 Concrete landscape walls (3) Posts and walling of in situ concrete or in situ and precast concrete 8443 Natural stone landscape walls (1) Natural stone masonry walling, uncoursed or coursed, with dry or mortar joints, concrete cores and reinforcement to form free-standing walls 8444 Cast stone landscape walls (0) Masonry of reconstructed stone and precast concrete simulated stone 8445 Gabion stone landscape walls (0) Gabion stone landscape walls constructed with Gabions - mesh cages wired together and filled with stone and other fill 8448 Composite landscape walls (0) Walling constructed of various materials in combination