Selkirk Universal Rubber Boot Kit, 23-4/5x21-1/2-In. It is suitable for chimney installations on corrugated roofs with a pitch from flat to 12/12. The kit includes a rubber boot, spacers, a special storm collar, and mounting screws. It fits chimneys from 5 inches to 8 inches in diameter.

• Used for installations on corrugated roofs flat to 12/12 pitch.
• Made of galvanized steel with EPDM rubber.
• Black finish.
• Base dimensions are 11-3/4 in. x 20 in.
• Roof pitch is 0 to 6/12.