Synthetic Diamond, Diamond Drill Bit, Diamond Cutting Disc manufacturer / supplier in China, offering CVD Diamond Record Stylus for Engraving Sound Grooves Onto Blank Vinyl Record, Hpht or CVD Diamond for Record Cutting Stylus and Vinyl Records Stylus Tip 4*0.7*0.7 4*0.2*0.2, Φ153mm Four Wings Concave Arc PDC Bit Anti-Deviation and so on.