SL300 Series is the Hearth & Home Technologies chimney system for wood-burning fireplaces with an 8" flue. The RF370M is an SL300 roof flashing for 0 to 6/12 roof pitch, supplied as a multi-pack of 5. It seals the roof penetration around the chimney pipe and sheds water away from the opening. Use a separate flashing for steeper pitches. Always confirm the pipe size, approved components and clearances in your fireplace, stove or chimney installation manual before ordering. Special order.