6″ Diameter, 13″ X 18″ Top Plate (Be Sure To Order Silicone Sealant)

6″ Diameter, 13″ X 18″ Top Plate (Be Sure To Order Silicone Sealant) 6″ Diameter, 13″ X 18″ Top Plate (be sure to order silicone sealant). This 6″ Heat-Fab Saf-T Liner 13″ X 18″ Top Plate seals the void between the liner/insulation exterior and the chimney flue interior. It also helps to support the weight of the liner in conjunction with the top clamp. Made of heavy 18-gauge stainless s