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The diameter of our tunnels is 50 cm. The spiralised/stiff part and the unspiralised/soft part of the tunnel is 300 cm each (total length 600 cm). The weight of the foil/material of the tunnel is approx. 600 g/qm. For the spiralising of the tunnel a 4 mm diam. steel wire is used which is welded onto the tunnel with a pitch of 20 cm.
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