Useingyour example...DQ 3-49..The DO is the series of shafts that ran. 3-thickness of carbon fiber on the aluminium core. -Number..last two digits of the core tube diameter in thousandths of an inch. If you should have a shaft with this type of print on it let's say...3L-49 / 340..the L would stand for "a lighter spine shaft"...the letter "x" indicates the lightest spine of that core tube size. The 340 spine [ deflection measured in thousandths of an inch] at 28" span for ALL sizes. Hope this wil help,if I've done it right.....Skip
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