... resistant to corrosion and durable. stainless steel heavy duty commercial glass door hinges for glass folding door SA8500H-7 1)1. Material: ... special in producing sliding door ,swing door,moving gate,folding door ,glass hinge,spider,handle lock patch fitting,and ... 24 hours=one year outdoor exposure Certificate stainless steel heavy duty commercial glass door hinges for glass folding door SA8500H-7