We use only quality, lead-free uPVC profiles made with high gloss finish surface, high resistance to UV radiation, and high impact strength. It is low-maintenance and easy to clean. It has multi-chambers that improve insulation against noise and heat. All joints are welded and all sides are sealed with weather seal sealants to impede leaks. Drainage holes are strategically placed for water to pass through to protect against heavy rains. We use heavy-duty rollers and brush seals to help the sash glide smoothly. Multi-locking handles are used to secure against forced entry. Available in multiple uPVC colors and glass options.