The KNB-050 ABS knob with a 3/8″ collar and a threaded brass connecting insert is the black replacement knob for the popular VR-140 Pro and PXR mirror systems.
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![PTM Watersports KNB - 050 Replacement Knob - Black [P12848-36 BK]](http://www.essentialmarineservices.com/cdn/shop/files/87605XL.jpg?v=1702491877&width=1445)