Material is PVC (vinyl chloride resin). PVC: Scratch resistant and resilient material. It does not have a shinny sound like aluminum blinds, very quiet, and is cheaper than wood blinds. Width 63.8 - 72.8 inches (161 - 186 cm) is a separate type. Separate Type: 2 sections in the center. Example: If the width is 69.7 inches (176 cm), the width of 34.6 inches (88 cm) will be Operation (height and blade angle adjustment) is set on both left and right sides.