This is a Miller Industries Control Handle Knob. It is black in color and is used on a 2005 or older Series car carriers.
Features:
BlackBlank Fits:Century 10 Series Steel & Aluminum Carriers Prior to 20042002-Current Century 15 Series Steel & Aluminum Carriers2002-Current Century 20 Series Steel & Aluminum Carriers2005-Current Century 30 Series Steel CarriersChallenger Car CarriersProduct Dimensions: 1.5"L x 1.36"H x 1.36"H