# Install Master Flow 4 in. Dampers (6-Pack) in individual runs of round pipe in an HVAC system (each sold separately) to balance and adjust the flow of air. These dampers include spring-loaded hardware and are constructed from galvanized steel to provide durability.

**Manufacturer:** LL Building Products  
**MPN:** `D-4`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | LL Building Products |
| Manufacturer name | LL Building Products |
| Manufacturer | LL Building Products |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Home Depot | 100396928 | 3.41 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/101000000/101359000/part_--D4---LLBuildingProducts--2eef069046.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp