... . OEM service 4. Fast delivery 5. Carbon steel material About us :1. We are one of the leading manufacturers of semi-precision ... , AISI 1055, AISI1085Size1/8 , 5/32", 3/16", 7/32", 1/4", 4mm, 5mm, 6mmGradeG200, G500, G1000HardnessHRC60ApplicationGrindingPackingBulk packing,pouch packing,plastic ...