Ball Slide Assemblies - Inch Family: D Model: D-2 Price: $ 83.00 - Clear Anodize - Standard The standard finish is a clear anodize carriage and black anodize base. Black anodize carriage and base is available at no extra cost. Carriage 4 Holes (I) : 2-56 UNC-2B Thread Base Hole d : .101 Base Hole D1 : .144 Base Hole h : .100 Counter Bore Screw Size : #2