Reinforced articulation kit for top hung casement openings with arm stays, consist of: Arm balancing system. Stainless steel reinforcements. Fibreglass reinforced nylon blocks. Extruded aluminium hinges. Stainless steel hinge pins. Rods and anchor plates in black oxidized aluminium. Stainless steel pins and screws included. Arm stays length: 300 mm. Maximum weight capacity: 90 Kg.