Finefit's Retractable slider fitment has a unique style of operation, otherwise known as a collapsible window/door. The type of mesh used in this fitment is a pleated mesh (Fibre & Poly-propylene mix). This sliding system is best suited for large openings, Courtyards & Balconys. The frame of this fitment system is made of heavy Aluminium sections to avoid bend or instablility when doing larger screen fitments.