(25 Pieces) PGN - 1/2 Inch (0.5) Precision Chrome Steel Bearing Balls G25

We use them in our after school program to test the viability of our engineering projects.

They have a thin coat of grease on them when they arrive but if they didn’t they would probably rust so good for them for keeping it like that. Other than that I am just using them as weights and to kiddos some basic physics and they work great for that.

Theyre pretty cool using them for a marble track. Standard marble is not a half inch by the way so I just scaled my marble track down but they are a great product perfect for my application.

Perfect for science experiments!

just as describe

The product was fine and the shipping was really fast.

Exactly what I needed for my project.

Derrick stiff leg.

Exactly what I ordered. But I I am a dumb dum and ordered the wrong size. Lol

Exemplary precision balls