Beijing Sanlicom Technology Co.,Ltd is a high-tech company integrated with research,development,production and sales,specialized in modern greenhouse facilities,accessories and material. The company located in Beijing. And the closed cooperation between our innovative R&D team and Science Research Institutes keeps our products always leading in the industry. Our products include Ventilation Equipment, Covering & Fastening Material, Thermal System , Heating Equipment, Control System,Frame & Structure, Cooling System etc. SLC serial film rollers are newly developed products which applied for both roof and sidewall ventilation ,are shared with great popularities among its users.