Features:
1) Excellent performance and high-class product (B1 grade)
2) Highly resistant to wind p

Features: 1) Excellent performance and high-class product (B1 grade) 2) Highly resistant to wind pressure 3) Flexible to open 4) Seal of good performance 5) Adopts pair seal in the cannelure of the casement sealing strip 6) Sealing strip is elastic under wind pressure 7) Waterproof design 8) Adopts deep gloove around the sides 9) Aesthetic in appearance, with a luxurious and natural design 10) Smooth seamless appearance, with all of the screws hidden in the body of the extruded parts