Hardened 8mm Catapult Slingshot Ammo Steel Ball Bearings Packs of 2000 800 400
Industry Standard Grade 100 420 Stainless Ball Bearings: High Quality Graded 420 Stainless Steel Ball bearings made from. hardness is all the way through the ball. 420 Stainless Steel with a hardness of 52 -55 HRC Rockwell Scale, the.