Olympia 3-Pack Universal 18 Gauge 18x18 Top/Bottom Plates (TPRGD3-1818) - Heavy Duty Steel Framing Components for Construction & DIY Projects" (Note: I corrected "Tprgd3" to "TPRGD3-1818" assuming it's a product code/SKU, standardized the measurement format, and added construction/DIY use case for SEO.)

3" Olympia New Universal Components 18-Gauge 18" X 18" Top/Bottom Plate - TPRGD3-1818

This top and bottom plate set serves two main purposes: the top plate can be used for sealing the top of the liner to the flue, while the bottom plate is to provide additional support for a more secure connection. These Universal Components fit all the leading flexible liner brands.

WARNING: Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause cancer. For more information go to .