SELKIRK Sure-Temp Insulated Tee - Used to start chimneys indoors or outdoors using a wall support assembly or masonry pier. Insulated tee cap included, removable for inspection and cleanout. Maximum height of chimney which can be supported by an insulated tee is 50'. - Depth: 6", Height: 12-3/4", Material: Stainless Steel, For Use With: Model SSII, Pkg Qty: 1