Check the listing for details. 10" Diameter, Single Wall Grease Duct, 48" Fixed Length. Condition: New. Listed at 202.00 USD. 10" Diameter, Single Wall Grease Duct, 48" Fixed Length Ductwork IncludesConstructed of UL 409 Stainless Steel48" Fixed LengthRecommended Duct Sizes Medium Duty Hood Lengths 5'6"-7'5"Recommended Duct Sizes Heavy Duty Hood Lengths 4'6"-5' 11" Features48" Fixed Length Duct Made in USAUL-1978 Listed Grease DuctAll 409 stainless steel constructionDirect replacement for in field welded steelLimited Lifetime Warranty Ductwork Overview HoodMart Grease Ducts. MADE IN USA and constructed of all stainless steel. UL-1978 Listed for direct competitiveness against single wall field-welded steel. Conforms to the requirements of NFPA-96. Optional Double Wall Zero Clearance UL-2221. Factory-Built Enclosure listing as an alternate to two layers of field-applied insulation.