4" x 6-5/8" DuraVent DirectVent Pro Double-Wall Galvanized Snow Splitter 6DT-SP This snow splitter is three times thicker and stronger allowing it to stand up against heavier snow loads and preventing snow from getting into your chimney liner. Bendable attachment flanges allow it to mount on any roof slope. Use to divert snow around chimney vent and roof flashing. Constructed of paintable galvanized material. Ships flat for easy assembly. Works with 6" 7" 8" and 10." Use with pellet oil corn and bio-fuel appliances Laser-welded super ferritic stainless steel inner walls and galvalume outer walls Outer diameter is 5/8" larger than inner diameter 1" clearance to combustibles No additional gaskets or sealants needed The precise fit of twist-lock connections is fast secure and leak resistant. Adaptability is provided by swivel elbow connections and multiple termination options .020†aluminum inner wall .018†galvanized steel outer wall Painted outer walls made of laser welded .018†galvalume steel. Caps also available in stainless steel and copper. Outer pipe brings combustion air to the appliance. Inner pipe exhausts flue gases to the outside. Gaskets or sealants not required (unless specified by the appliance manufacturer).