{"v":"2.0","page_type":"product","title":"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.","breadcrumbs":[{"label":"Home","href":"/python/html6/index.html"},{"label":"Brands","href":"/python/html6/menu_brand_index/menu_brand_index_brands_87101ba214.html"},{"label":"LL Building Products","href":"/python/html6/menu_brand_products/1000/86000/menu_brand_products_LLBUILDINGPRODUCTS_1_766602a2cb.html"},{"label":"D-4","href":null}],"content":{"product":{"mpn":"D-4","manufacturer":"LL Building Products","brand":"LL Building Products","brand_url":"/python/html6/menu_brand_products/1000/86000/menu_brand_products_LLBUILDINGPRODUCTS_1_766602a2cb.html","title":"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.","description":"","attributes":[{"name":"Brand name","values":[{"value":"LL Building Products","url":"/python/html6/menu_attr_pair/1000/20000000/20093000/menu_attr_pair_Brandname_LLBuildingProducts_1_0e8ace8f6d.html"}],"name_url":"/python/html6/menu_attr_pair/1000/20000000/20093000/menu_attr_pair_Brandname_LLBuildingProducts_1_0e8ace8f6d.html"},{"name":"Manufacturer name","values":[{"value":"LL Building Products","url":"/python/html6/menu_attr_pair/1000/116000000/116892000/menu_attr_pair_Manufacturername_LLBuildingProducts_1_ed4f9a7617.html"}],"name_url":"/python/html6/menu_attr_pair/1000/116000000/116892000/menu_attr_pair_Manufacturername_LLBuildingProducts_1_ed4f9a7617.html"},{"name":"Manufacturer","values":[{"value":"LL Building Products","url":"/python/html6/menu_attr_pair/1000/186000000/186831000/menu_attr_pair_Manufacturer_LLBuildingProducts_1_4593b44af6.html"}],"name_url":"/python/html6/menu_attr_pair/1000/186000000/186831000/menu_attr_pair_Manufacturer_LLBuildingProducts_1_4593b44af6.html"}],"images":[],"distributors":[{"name":"Home Depot","sku":"100396928","url":"http://www.homedepot.com/p/4-in-Damper-D-4/100396928","pricing":[{"quantity":1,"price_usd":3.41}],"stock":{"available":false,"quantity":null,"lead_time_days":null},"moq":1,"multiple":null,"image":"http://www.homedepot.com/catalog/productImages/65/4a/4a7d2b9b-92ae-474b-9886-86d0224fdc52_65.jpg"}],"amazon":{"available":false,"products":[]},"metadata":{"generated_date":"2026-09-16","last_updated":"2026-09-16","data_sources":["Home Depot"],"completeness":0.55,"version":"1.2"}}},"pagination":null,"nav":{"home":"/python/html6/index.html","brands":"/python/html6/menu_brand_index/menu_brand_index_brands_87101ba214.html","parts":"/python/html6/menu_part_index/menu_part_index_parts_909e6bf0ca.html","attributes":"/python/html6/menu_attr_index/menu_attr_index_attributes_d7f67a250d.html"}}