Fire protection duct functional integrity E60/E30 FWK 90 50x60mm L=0.75m pure white. Fire-resistant cable routing duct FWK90 - E60 in accordance with DIN 4102-12 for functional integrity during wall and ceiling installation and E30 in accordance with DIN 4102-12 for functional integrity during suspended installation. Duct base with removable and multiple screwable duct top. General building inspection certificate P-MPA-E-99-062 or P-BWU-I 17.9.2.