1. good quality 2. competitive price 3. fast shipping 4. best bucket tooth 1.Materials: carbon steel, alloy steel, cast iron, cast steel, pig iron, grey iron, ductile cast iron and so on2.material standard:GB,DIN,EN,NF,ISO,JIS,SS,BS,AISI,SAE,ASTM,UNS,ACI3. Technology: lost wax (water glass) Manufacture process:1) Lost Wax Process: Wax Patterns, Sand Shell Making, Dewaxing, Pouring, Sand Cleaning, ...