1、OE Number: The referencing oe number of this AC heat control knob are 121 0001 000, 1210001000, 702‑5401, which is molded and designed depend on the original data. 2、Fitment: The AC heater control knobs are replacement for Peterbilt 330 335 357 367 375 378 379 384 386 387, please check the model of your vehicle before ordering to confirm compatibility. 3、Easy to Operate: The knob is reasonably designed, the press is smooth, the use is simple, the rotation is easy, and the control is precise, making the adjustment of the air conditioner more convenient. 4、Excellent Material: Made of high strength ABS materials, wear resistant, corrosion resistant, able to maintain durability in various harsh environments, and serve you for a long time. 5、Ideal Replacement: Direct replacement installation, meets or exceeds OEM standards for the replacement of old and damaged one on original vehicles. Item Type: AC Heat Control Knob OE Number: 121 0001 000, 1210001000, 702‑5401 Material: ABS Fitment: Replacement for Peterbilt 330 with Sprague HVAC System Front Heater & A/C Control Knob 1995-2013 Replacement for Peterbilt 335 with Sprague HVAC System Front Heater & A/C Control Knob 2005-2010 Replacement for Peterbilt 357 with Sprague HVAC System Front Heater & A/C Control Knob 1987-2006 Replacement for Peterbilt 367 with Sprague HVAC System Front Heater & A/C Control Knob 2007-2009 Replacement for Peterbilt 375 with Sprague HVAC System Front Heater & A/C Control Knob 1987-1995 Replacement for Peterbilt 378 with Sprague HVAC System Front Heater & A/C Control Knob 1987-2006 Replacement for Peterbilt 379 with Sprague HVAC System Front Heater & A/C Control Knob 1987-2006 Replacement for Peterbilt 384 with Sprague HVAC System Front Heater & A/C Control Knob 2007-2010 Replacement for Peterbilt 386 with Sprague HVAC System Front Heater & A/C Control Knob 2005-2009 Replacement for Peterbilt 387 with Sprague HVAC System Front Heater & A/C Control Knob 2003-2010 3 x AC Heat Control Knob