This Zenith Dorsal and Lumbar Drop Selector Knob fits both the zenith 440 and the zenith 420 air drop tables. This knob is used to select the DD, LD, LD & DD, LD & PD or PD. There is a Right and Left side knob.
To select the proper side; stand at the rear of the table...There IS a 25% MFG RESTOCKING CHARGE if the side wrong knob is ordered
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Warranty Information
This Zenith 440 Dorsal and Lumbar Drop Selector Knob is 100% guaranteed to be free of defects for one year from date of purchase.