Briefly: ropskin doors and windows there are many kinds of curtain wall profiles.
1. Flat open (3400 3500 3600 3700, etc.)
2. Push and pull (868 878 888 898 988 8088, etc.)
3. Security door (2000 2008, etc.)
Then there are several profiles in each series to form a window.
3100 3400 3500 3600 3700 3750 are all flat series, the difference is that the width of the outer frame and inner frame, and the other is broken bridge aluminum of the 3500 is 5CM, 898 988 is flat series, which is also made of more profiles, the width of the frame is different, 898 is 8CM 988 is 9CM, others are different in detail, but the price is quite different.
Ropskin anti-counterfeiting mark can be seen visually on the surface of the profile with the company LOGO "ropskin". Through UV ultraviolet rays, it can be seen that the anti-counterfeiting mark with "LPSK" and production number is printed at 130cm interval.
