Skirted Control Knobs
Fit controls with 6.35mm (¼in.) shafts 
Body colour Black
Material: phenolic plastic
Choice of Pointer or Numbered skirt  (Menu select)
Grub screw fixing
Dims for picture
Skirt diameter A=30mm, Nut cover diameter B= 16.4mm, Knob height C= 18.1mm, Body diameter D = 15mm.