Purlin Cip for Conduit, Girder Thickness 1.5-4mm, 19-26 Diameter, Load Rating 12kg, Zinc silver colored sacrificial coating (Z600+), waterproof topcoat, for use in indoor and outdoor humid and mildly corrosive environments. Coating is completely chromium free. Hammer-on. Vise Pressure Closed. Reverse Orientation.