Hell Machine One Way Diamond Engraving Stylus

hell machine diamond engraving stylus1.the diamond engraving styli for both hell and ohio machines are not only produced on sophisticated polishing benches but, during polishing, monitored by interference microscopy in order to secure the surface finish.2.life:under condition of dust-free to work for 200 hours3.angles no.: 110â°, 115â°, 120â°, 125â°, 130â°, 135â°, 140â°4.payment way:t/t,western union,5.transport way:international express 6.port