Materials Description: rail, connecting rod and rivet: stainless steel 430. The metal tail plug: zinc alloy. Plastic Fittings: Nylon with glass fiber. Data evaluation: Function: cycle test over 25,000 times and meet BS 6375 Pt.1: 2004 & PT2: 1987's requirements. Corrosion resistance: comply with BS EN1670: 1998 Level 4 standard. Open angle: meet BS 5588:1998 PT1: 1990 B requirements of building codes and meet BS 8213 PT1: 1991 standard. Features: support new series of easy to clean / 90 degrees casement type window. Reliable service life guarantee. Find an opening angle of 90 degrees, the structure is simple, easy to use. Easy to clean functional structure design, with elastic button device, when the window handles one way or another when the windows are closed, the window stays in the cleaning position automatically homing to the normal position. The tail plug compressible flexible design, the windows in each switch can be a better seal and secure. WINDOW STAY total stacking height 13 and 17MM, suitable for all UPVC window type.