friction hinge 1,window friction hinge 2,materail: ss201,ss301,ss304 3,size: 12",14",16",18",20" 4,competitive price ss301 heavy duty friction hinge FBX225 • ... 22mm square slot, non-handed, heavy-duty friction stays. Suitable for till & turn casement PVC steel window or aluminium window.• Nylon ... with you. Welcome to join us! ss301 heavy duty friction hinge FBX225