... Engineering/plastic slider for strength EZFH200 Series Heavy Duty Stainless Steel Friction Stays 1. Unique asymmetric ... 90kg.3. It's strongly recommended that large or heavy duty top hung windows are restricted to opening ... support arms may be necessary.Material: SS304, SS340, SS201.Size: 10", 12", 14", 16", 18'', 20", 22 ... ", 24", 26".For top hung window(the size 12"-18" can also be chosen for side ...