China 3.5mm 0.137inch High Precision AISI316L Stainless Steel Ball for Hand Massage 0.174G, Find details about China Stainless Steel Ball, AISI 420c 440c Stainless Steel Ball G10-G1000 from 3.5mm 0.137inch High Precision AISI316L Stainless Steel Ball for Hand Massage 0.174G