... , waterproof,5) Features: Abundant designs, Easy to install,Louver adjustable for air permeability, sunlight, sound, heat, environmental-friendly 6) Colors: Refer ... to color swatch, customerized color available7) Frame: Optional among L1, L2, Z1, Z2. U 8)Hardware: Various ... .Contact person:BillMob:+0086-18680407896 4.5" louver T post for L frame Wooden Plantation shutters