(patented) Aluminium hinge pivot, centre of rotation 36 mm, 1 zamak counterplate 14×14 mm, 1 stainless steel spring leaf, 2 stainless steel special screws M8x28 for counterplate fastening, 4 galvanized self-tapping socket head cap screws Ø 6.3×22, 4 galvanized crinkled washers, 1 stainless steel socket head cap screw M5x25 for counterplate fastening, 1 nylon cap.