These have 12mm shaft.
ORIGINAL Simmons Drums SDS MTM TMI MTX SPM New/Old Stock Knobs 22mm Shaft
ORIGINAL Simmons Drums SDS MTM TMI MTX SPM New/Old Stock Knobs No Shaft
New Old Stock Slider/Fader Caps For Vintage Simmons Trixer SDS 2000 Drums -Red
New Old Stock Slider/Fader Caps Vintage Simmons Trixer SDS 2000 Drums - Yellow
Vintage Simmons Drum SDS-9 EPROM Metal Snare & Rim Cover Plate
