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The polycarbonate case shells are produced by injection moulding. The advantages of polycarbonate lie in its high impact toughness, strength, stiffness and hardness over a wide range of temperatures. Aluminium frame with plastic impact corners, integral combination lock and case lid positioning. Internal fitments for internal height 150 mm: 1 base tray including cover board with 12 double elastic straps. 2 transverse dividers, 6 partitions and 10 inserted boxes in the base shell. 1 tool board with 9 textile shaft pockets and tool holder on the front and back. With wheels and push handle, 4-stage telescopic extension and ball bearing wheels.