P903.024 SIREN DISC
Description
The disc has four sets of drilled holes arranged in co-centric circles. The number of holes in each circle are 34, 45, 54 and 72 respectively. For use with whirling stand.
The disc has four sets of drilled holes arranged in co-centric circles. The number of holes in each circle are 34, 45, 54 and 72 respectively. For use with whirling stand.
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