... 4.Thermal-break,heat and sound insulation. Aluminium Folding Door1. Profile: a. Alloy : Aluminium 6063-T5, b. Wall thickness: 1. ... With Thermal Break,More Energy Saving/ Normal / Wood Indoor & Aluminium Outdoor 2. Glass: a.Thickness: Single 4mm -8mm, Double ... other principles of design pressure, more secure seal.6. Tamper, security, safety and reliability.7.place for: bathroom, kitchen, bedroom ...