Polycarbonate roof: Thick plastic panels of the pergola kit protect the inside from direct sunlight and harsh UV rays for safety in the sun.Adjustable: Height and columns of the metal pergola can be set to a position which is suitable for you. Suggested installation height: 231-250cm.Built-in holes: Prevents water and liquids from building up on the structure of the garden pergola and causing rust and decay.Aluminium frame: Naturally resistant to corrosion and tough, the pergola canopy ensures a steady and reliable outdoor structure.Dimensions: Roof: 435L x 302Wcm. Post: 210H x 8L x 4Wcm.