WARNING: The Flashing Kit must be used with Triple-wall Heat Protector Chimney 3.5″. There is a risk of melting if install the Flashing Kit on stove pipe directly. Designed to fit perfectly with the Triple-wall Heat Protector Chimney 3.5″, the Winnerwell Flashing Kit Large is made from silicone which resists high temperatures and is held in place by stainless steel rings with six wing nuts. This Flashing Kit Large can be used to create a weather-tight seal on existing stove jacks or when installing a stove jack in a tent or shelter.