DuraVent DirectVent Pro Snorkel Termination Cap Diameter:4"x6.625" it is very effective in

it is very effective in spot-heating work areas inside of doorways

or Grey colored glass with a lifetime warranty

Model 7SWTL66  Application Designed for installations from the appliance/stove to high-temperature chimney products

Standard reflective black crushed glass media

DuraVent DirectVent Pro Snorkel Termination Cap Diameter:4"x6.625" it is very effective inOverview DuraVent is the premier company in the venting industry. With a broad range of engineered venting products, DuraVent has earned its reputation as the industry leader by offering innovative, safe, and professional products for the HVAC and Hearth markets. DuraVent's direct vent is specified by nearly every major stove and fireplace manufacturer in the U. S. and Canada, with the largest choice of termination caps for direct vent available.