PTM Edge Abs Knob For Vr Series/Pxr Mirror Systems KNB-050. Available in Midnight (black) only. VR-Series and PXR mirror systems sold separately. Features of PTM Edge KNB-050 Abs Knob For Vr Series/Pxr Mirror Systems ABS knob with 3/8" collar and threaded brass connecting insert Replacement knob for VR-series and PXR mirror systems Sold individually Color: Midnight Package Contents: PTM Edge KNB-050 Abs Knob For Vr Series/Pxr Mirror Systems PTM Edge KNB-050: Abs Knob For Vr Series/Pxr Mirror Systems