Intertherm Roof Jacks Srj5 Roof Jack Assy 49" 59" 59in. SRJ Roof Jacks are compatible with all CMF2 Oil/Gas Gun Furnace models. Assembly includes: flashing barrel ceiling trim plate and vent. Roof Jack Vents are used to provide furnaces with fresh air for combustion and vent out flue gasses. Check manufacturer recommendations to ensure a proper fit. Features of Intertherm Roof Jacks Srj5 Roof Jack Assy 49" 59" Must be installed on a flat surface Roof Jack Assembly #104060024 (SRJ5) is designed for roof cavities 49" to 59" (ceiling to roofline) Compatible with all CMF2 Oil/Gas Gun Furnace models Assembly includes: flashing barrel ceiling trim plate and vent Roof Jack Vents are used to provide furnaces with fresh air for combustion and vent out flue gasses Package Contents: Intertherm Roof Jacks Srj5 Roof Jack Assy 49" 59" Intertherm 104060024: Roof Jacks Srj5 Roof Jack Assy 49" 59" 59in