Steel doors and windows to tell whether the toxic ways: First, look at the product profile name. Toxic PVC doors and windows are generally inexpensive lead salt stabilizer for the main raw material. Such materials contain lead, the name "PVC profiles." Non-toxic and non-toxic plastic doors and windows are clean, environmentally friendly mercaptan organotin stabilizers definite T-137 steel doors and windows, the name "VPVC profiles." Second, look at packaging and labeling. Look tab on the product packaging or labeling of the product name, the implementation of standards, name and address, quality grade. If the basic content tagging is complete, whether text or images chromatic ghosting or bias. Such as packaging and labeling incomplete content, text or graphics overlay ghosting or deviation definite steel doors and windows, is certainly small plastic doors and windows profile production definite wholesale, it is best not to buy. Third, look at quality proof. After selecting steel doors and windows must be accountable to the dealer to ask for product quality inspection certificate. If the certificate of inspection reports or test items marked with a lead content, prove that the products are PVC profiles. Steel doors and advantages: a: resistance to erosion: steel doors with wood and aluminum higher compressive, tensile, anti-blow, crack, superior strength and resistance to expansion of steel, wood and aluminum corrosion resistance, without air, salt erosion. II: airtight: multi-layer steel doors and windows sealed design, and PVC-type surface is smooth, easy adhesion of dust dirt and dust with excellent results. Three: elegant and beautiful: PVC can be dubbed in various colors definite steel doors and windows installed, such as white, brown, blue, red, yellow, etc., consumers can freely select, and large sash, frame width of the glass, it will help the indoor lighting. If accompanied by a decorative metal accessories, can beautify the indoor environment. Gorgeous windows and doors, steel doors and windows] [definite, definite steel doors and windows provided by Ramada. Search for "Shijiazhuang sun room, bridge aluminum doors and windows, shower room, glass partition" reliable supplier network operators choose to have the whole alliance certification: Shijiazhuang gorgeous Door (www.sjzygf.com), trustworthiness and reliability, now "Business League Support" page click on the live chat with us now!