... (inside diameter): Φ14mm, Φ20mm, Φ25mm, Φ30mm6)Color: O=orange, B=black, G=greyDigital Position indicator SANKQ ... specialized in manufacturing professional with woodworking machine accessories more than 10years,such as ... with gauge, dial , handwheel , hand wheel with indicators, indexing plunger, universal joints and chains. position indicator with good quality SK04 Black color ...