36 X 32 28 GA SHEET METAL

Likely product description

Because this is labeled as sheet metal, the number format strongly suggests dimensional shorthand used by HVAC fabricators:

• SM = Sheet Metal
• 36 / 32 / 28 = Common dimensional callout pattern for duct/plenum sizing

Most likely application

Used as one of the following in HVAC duct systems:

• Supply/return plenum
• Transition fitting
• Reducer/adapter box
• Custom duct boot or fabricated trunk fitting

Important note

Unlike standardized retail parts, sheet metal part numbers are often shop/manufacturer-specific, so SM363228 may vary slightly by distributor/fabricator even if the dimensions are similar. Many sheet metal shops use internal shorthand coding for duct dimensions rather than universal catalog SKUs. This is common in HVAC fabrication workflows.