Friction Hinge, window stay ,friction stay; 1.Material:304# stainless steel 2.different size for choose 3.High quality Window Fitting--Stainless Steel Friction Stay HingeAdvantage1.Use of the the finest stainless steel:304# stainless steel.2.In line with China QB/T3888 "stainless steel sliding aluminum windows friction stay" standard.3.Use of steel slider, high strength, smooth sliding, wear and ...