SME 3009 bias guide for 3009 Series II Improved arms. Original part in good condition.
The bias guide is the anti-skate thread assembly fitted to the SME 3009 Series II Improved tonearm, looping over the bias lever notch and through the guide pulley housing to apply anti-skating force via a hanging weight. It fits both fixed and detachable headshell versions of the Series II Improved, as well as late Series II unimproved arms and the SME 3012 Series II.
