Paul from SWISCO responded:
October 14, 2015
Thanks for posting. Can you confirm the diameter of your tube? In my experience Hurd tends to use the larger 5/8" diameter tube, not the more narrow 3/8". If it is 5/8" (or 9/16"), I recommend our Series 600 spiral balance. If you confirm that the tube diameter is, indeed, 3/8", then I recommend our Series 900 instead.
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