[INQ. NO. 1408M01] 60mm System Window Frame 
Made with unplasticized PVC (U-PVC), SIAN Co.’s 60mm system window frames (BF-60PT) guarantees superior heat-insulation effect. With a width of 60mm, BF-60PT is suitable for use in villas, apartments, hotels, officetels and luxurious mansions. Its exterior part is weatherproof and comes in colors of white, black or dark brown.
82mm Small Window Frame
“BF-82N” small window frame from SIAN is multi-functional, featuring excellent heat-insulation and soundproof effects. While its weatherproof exterior part comes in a color or white, black or dark brown, the nonweatherproof interior part comes in colors of white, white oak, acacia, lyon walnut, white pearl and sonoma oak.
Large 115mm Window Frame 
With a width of 115 mm, SIAN Co.’s “BF-115R2” large window frame is made with unplasticized PVC (U-PVC). Highly durable, the model is a European multi-functional type and has superb heat-insulating, soundproof properties. Its exterior part is available in colors of white, black or dark brown, while the interior part comes in a color of white, white oak, acacia, lyon walnut, white pearl and sonoma oak.
Founded in 2002, SIAN has rapidly grown into one of the leading domestic suppliers of system window frames and doors. Today, the company’s products are being exported to various countries, including Australia, the Philippines, Vietnam, India, Bangladesh, Algeria and Nicaragua.
Highly regarded for its incessant investment in research and development, SIAN has been designated as a company of innovative technology by the Small and Medium Business Administration. The company has also been officially registered as a quality product supplier by the Public Procurement Service.
With ISO 9001 international certification, SIAN has obtained four international patents for its unique production technologies. The company was chosen as an “IP Star Company” by the Intellectual Property Center of Gangwon provincial government’s Industry and Economy Promotion Agency.
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Sonusys’s EVITZ is a window that has applied the rail concealment system and made a ground-breaking improvement to the indispensable performances of windows such as insulation, water-tightness, air-permeability, inside-wind pressure, condensation prevention, etc. as well as to the exterior(design), by using the rail cover to conceal the exposed bottom rail and creating a bottom frame with a clean plane structure.
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