3/8" Steel Ball Bearings / Marbles, 10/pack SKU: 60315

3/8″ Steel Ball Bearings / Marbles, 10/pack

$2.63 USD

10-pack of 3/8″ diameter (0.375″ / 9.525mm) G40 Loose steel balls used in ball-bearings. From the stock we use in our marble kits!

In stock

$2.63 USD
SKU: 60315 Categories: , ,


These are loose 3/8″ Chromed Carbon-steel G40 bearings. These are not in a bearing-race. Think of these like “Steely” marbles when you were a kid (many, many moons ago).

We use these in our Marble Machine Kits, and as magnetic swivel points on our CarouSol “Squid Hunting” kit

  • 3/8″ (0.375″) diameter (9.525mm)
  • 3.6g each
  • LOTS OF 10. Buy 1 means you get a pack of 10 balls!
  • Grade 40

More Info

Weight .036 kg
Dimensions 5 × 2 × 1 cm


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