HHTFS540 | 30 Deg. Firestop Spacer | SL1100 | HHT570443697SKU:FS540Inventory ID:03610759Select Item:Price: $75.00Quantity: 30 Deg. Firestop Spacer for use with 11" ID & 13" OD Double-Wall Air-Cooled Chimney | HHT SL1100 Reviews Choose your rating12345