1, are made from the most excellent stainless steel. 2, meet (aluminum alloy stainless steel window window bracing) standard. 3, 50000 times overweight opening and closing test, maintain good function. 4 for in the corresponding specifications for doors and windows, glass curtain wall installation. 5, to accept the force applied to the heavyweight, lightweight. 6, which is suitable for the casement window. 7, unique design, advanced technology, rich styles. Main products have 22 groove, groove 18, groove 15 and 14 slots, 13.5 groove, groove series 12, pull type stainless steel tank support for windows and machine type slot limit support series