Roller Wheel, 15 Series, 30 Series, 40 Series, Overall Height 39 mm, Overall Width 17.6 mm, Black, Number of Mounting Holes 1, Polyamide, Unfinished, Includes Fasteners No, Metric, Wheel Diameter 39 mm, Compatible Brand and Series 15 Series, 30 Series, 40 Series, Compatible Product Type Structural Framing