Use as a top plate to seal the top of chimney liner installation or a bottom plate to help support a fireplace relining. All top plates come with a standard 2" collar. 3" 4" 5" 6" 7" Hole - 9" x 9" Top/Bottom Plate Regular price: $39.95 Sale price: 3" 4" 5" 6" 7" Hole-13" x 13" Top/Bottom Plate Regular price: $42.95 Sale price: 8" 9" Hole- 10" x 10" Top/Bottom Plate Regular price: $39.95 Sale price: 8" 9" 10" 12" Hole -14" x 14" Top/Bottom Plate Regular price: $42.95 Sale price: Copyright © 2012 Chimney Depot Inc. All rights reserved. Call Us @ 1-702-483-1587