friction hinge 1,window friction stay,friction hinge 2,materail:ss201,ss301,ss304,ss430 3,size: 8 ... ,easy to instal ss304 heavy duty friction hinge FB224(4 bar) 1materialss304, ss301, ss201 ,ss430 with stainless steel slide2size8” ... 20” 22” and 24”are available.3Bar thickness2.0, 2.5, 3.0mm or at customers'request4Bar width16mm ,18mm5Groove width18mm ... etc. ss304 heavy duty friction hinge FB224 (4 bar)