Quantity per package: 5 

Grade: 25
Material: Stainless Steel (AISI 440)
Diameter: 1/2", 0.5 inches (12.7 millimeter)
Weight: 0.2969 ounces (8.419 grams) 

PGN's G25 1/2" Stainless Steel Balls extremely precise and smooth surface guarantees you won't find any defects, such as flats, pits, soft spots, and cuts.