The M&G DuraVent 55DFSW-20KT is a tee kit from the Duraflex Collection. It is commonly used with different fuel types such as wood, oil, coal, gas, and pellet. This tee kit is also designed for use with different applications such as fireplace inserts, furnaces, boilers, and water heaters. It comes in a stainless steel finish for added strength and can resist heat and chemical damage. A flexible liner chimney pipe, top plate, cap, and tee with a cap are included in the kit. This tee kit features a 5.5-inch inner diameter and has a length of 20-foot. This tee kit is covered by DuraVent lifetime limited warranty. It is also a UL certified for meeting the standard for safety. DuraVent is known to be the leader in providing innovative solutions for the venting industry. In cooperation with DuraVent, we at PlumbersStock carry high-quality products like this tee kit for a very affordable price.