... and stable. Item: Interior PVC shutter, basswood looklike1) Material: high quality PVC shutter with aluminium insert2) Specification: Louver/blade: 2.5"/3.5 ... surface coating, waterproof,5) Features: Abundant designs, Easy to install, Louver adjustable for air permeability, sunlight, sound, heat, environmental-friendly6) ... office buildings and houses11)Transportation: By sea or by air PVC shutter