Structure: 3-in-1 composite of aluminum alloy + POM (polyoxymethylene); four-way expansion with hollow screw for glue injection.
Process: Screw-driven simultaneous expansion (up, down, left, right) of 0.5–0.7mm; no pre-drilled glue holes required, glue injected directly through the hollow screw.
Function: Dovetail positioning prevents misalignment; full glue visibility; POM material offers wear resistance, corrosion resistance, and excellent waterproof performance.
Application: High-end system windows, curtain walls, coastal/humid regions, and projects with extremely high requirements for waterproofing and durability.


