Everything you need in one kit to do the job. Our kits include a section of our single-ply liner. Tee & tee cap, top plate with a collar, round cap, fasteners. Also included are: Installation Instructions and a homeowner's mail-in Warranty Card. Tested and approved to UL1777 Zero Clearance Standards*. 316-L .006 Stainless Steel. Seven ply quad-lock knurled seams. 100% leakproof, airtight, and unbreakable lock. All-purpose for use on Oil, Gas, Wood, and Pellet systems. Lifetime Warranty. Made in the USA.