Fire protection duct for direct wall and ceiling mounting consisting of water- and frost-resistant glass fiber lightweight concrete of building material class A1 according to EN 13501 Part 1 for fire-safe installation of fiber optic cables (FOC) in accordance with functional integrity according to DIN 4102 Part 12, classified for E30 and E90. Including 10 countersunk screws and 3 x 1 m sealing strips.