These aluminum window profiles are for sliding windows. The sash moves along the bottom frame with wheel so they won’t occupy extra space whether when open or closed. Sliding windows are simpler on structure, cost less, easy to be moved and can work with screen window well, so they’re widely used whether residentially or industrially. But the weakness is sealing and waterproof and sound insulation.
Most of window frames are treated with anodizing or powder coating, and wooden print. Power coating is a good choice for customers prefer special colors. Considering better insulation, the thermal break profile is a real good choice.