Material: Carbon steel,alloy steel,stainless steel,aluminum,etc. We provide the absolute best service and highest quality. Material: Steel, brass and aluminiumCMM, digital projector, Rockwell hardness tester, hydraulic pressure testing bench, thread ring and plug gaugesPlain carbon steel like:AISI1045 CK45 etc.Low alloy steels like:AISI4140;AISI4130 etc.High alloy steel like:stainless steel, ...