This is a Miller Industries Control Handle Knob. It is grey in color and is
labeled "Up/Down" for wheel lift tilt operations. See Features for related
wreckers and Brochures for reference charts.
Labeled Up/Down Color: Grey Century 300 Series Holmes 400 Series Vulcan 804 Vulcan 806 Vulcan 807 Century Modular 211 Product Dimensions: 1.55"L x 1.38"W x 1.38"H Inner Diameter: 0.3" Outside Diameter: 1.38"