Stainless Steel Sphere 1.Low price & High Hardness 2. OEM service accepted 3. Low noise &wear ... Material Available:AISI 304~AISI 316AISI 420~AISI 440C2. Size: 0.5mm--25.4mm, 1/4",3/16",5/32",1 ... %S%PropertyAISI 3040.07 Max1.00 Max2.00 Max17.0~ 19.08.0~ 10.50.045 Max0.03 MaxSlightly magnetic ,Flat ... 85 minAISI 4400.95~ 1.201.00 Max1.00 Max16.0~ 18.00.045 Max0.02 MaxMartensite,fair corrosion to water ...