- The Hydro Carbide plants of VR/Wesson are leading suppliers of pre-formed tungsten carbide compositions for a wide variety of markets. The operations enjoy a leadership position in tungsten carbide rod, die parts, rolls, and other products for the metalworking market. They are also major suppliers of nozzles, studs and substrates, valve parts, bearings, and other wear parts for the oil and ...www.hydrocarbide.com