4 inches duct diameter sfw 25 air curtain

{"cid":"91223450","title":"SFW-25 Air Curtain Wall Mounted Ventilation System with 48dB Noise Level 4 inches Duct Diameter and 120V Voltage","imgUrl":"https:\/\/img.chinax.com\/nimg\/63\/04\/ca3ae3122db057269305f223bcbc-200x200-1.jpg","attrs":[]}

{"cid":"91222833","title":"SFW-25 Air Curtain Wall Mounted Ventilation System with 120V Power 520*380*150mm Compact Design and 4 Inches Duct Diameter","imgUrl":"https:\/\/img.chinax.com\/nimg\/70\/63\/4131180a08f26ae00126a4994e0a-200x200-1.jpg","attrs":{"Price":"negotiable","Model Number":"SFW-25","Minimum Order Quantity":"200","Delivery Time":"3weeks","Place of Origin":"China","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union,MoneyGram","Packaging Details":"Wooden box packaging","Installation":"Easy To Install","Color":"White","Power Source":"Electric","Voltage":"120V","Transmission Form":"Gear","Hs Code":"8419500090","Specification":"520*380*150mm","Transport Package":"Wood","Type":"Wall-mounted","Duct Diameter":"4 inches","Airflow Capacity":"Up to 500 CFM","Certifications":"CE, RoHS","Warranty":"1 year","Refrigerant":"R32","Air Flow":"100-500 CFM"}}