A ready to use firestop collar, made of a galvanized steel housing and intumescent inserts for firestopping combustible pipes. Ready to use collar - no construction required, therefore fast installation time. Areas of application - Firestopping combustible pipes up to 4" in diameter in penetrations through fire walls and floors. Sutitable for the following pipe materials: PVC, CPVC, ABS, PVDF, PP AND FR/PP.