NEW one piece black Phenolic skirted knobs with a set screw and brass insert. These fluted round knobs are close matches for the classic knobs used on Orange Amps. Each knob features a painted dot indicator on the skirt. Fits ¼” (6.35mm) pot shafts. Available in 19-, 28-, and 42-mm diameters. This listing is for the 28mm diameter skirt:Height: 0.61 in. (15.5 mm)Diameter: 1.1 in. (28 mm)Fits ¼» shaft with set screw Sold in set of one knob. Picture of three knob set is for illustration of size comparison. Visit our eBay store for other radio accessories.