10-20mm 304 Stainless Steel Ball Slingshot Ammo Ball Bearings Solid Steel Ball

Ues For：Bike Steel Bearing Ball / Slingshot Ammo/ Industrial Bearings etc. Size：10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm. Material：304 Stainless Steel. Stainless steel standard: GB/T 3280-2015.

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