Building Ventilation ducts

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{"cid":"117260","pid":"22082621","pimg_url":"\/\/img1.b2bforus.com\/b8\/9f\/cb88a58e6e5e\/product\/74230359_s-w400xh400.jpg","name":"Modern air duct ventilation air volume control back draft damper for havc system","attrs":{"Price":"$4.80(100 - 1999 Pieces) $3.50(2000 - 9999 Pieces) $2.60(>=10000 Pieces)","MOQ":"100 Pieces","Delivery Time":"Negotiable","Brand":"Metalheng"}}

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