... Bushing Investment Casting, ST-52, Fully CNC Machine, very high precision. Cast Metal BushingInvestment Casting, ST-52, fully CNC machined, high precision.European quality, Competitive ... committed to providing all types of metal products with high quality and competitiveprices.What's in our production:Valves, Construction ... .3.Grey Iron, Ductile Iron, Cast Iron etc Investment Casting Machining Parts