... )2) Specification:A) Louver/blade: 2.5"/3.5"/4.5" width(11mm thickness)B) Customerized sizes available 3)Structure ... , waterproof,5) Features: Abundant designs, Easy to install,Louver adjustable for air permeability, sunlight, sound, heat, environmental-friendly 6) Colors: ... you to solve any problems.Contact person:BillMob:+0086-18680407896 4.5" louver T post for L frame Wooden Plantation shutters