The genuine Walraven Pacifyre MKII Fire Collar, item number 2141249251, is an essential fire stopping system designed for plastic pipes (PVC-U, PE, PP, ABS, SAN+PVC) and insulated metal pipes with a diameter between 249mm and 251mm. This high-quality fire collar is constructed with a durable stainless steel casing and contains a highly reactive intumescent material. In the event of a fire, the intumescent material rapidly expands, effectively crushing the pipe and sealing the penetration, thereby preventing the spread of fire and smoke. It is suitable for use in concrete, masonry, and lightweight partition walls and floors, providing up to 4 hours (EI 240) of fire resistance.