Sifam 12mm soft touch 18 spline knobs sifam 305tpnp120 006 a high quality control knob from sifam with modern styling a soft touch finish and a built in nut cover the red pointer line extends from the centre of the top of the knob down to the nut cover sifam 305tpnp120 006 12mm soft touch 18 spline knob with red pointer