Base Ten 10 CM Rods Math Manipulatives:

These Base Ten manipulatives are used to engage kids in concrete demonstrations of place value, number concepts, operations, measurement, fractions, decimals, percents and volume. Each unit is 10cm long. Available in sets of 30, 50, or 100.

If you're looking for ideas or activities that can be performed with the Base Ten System check out our Math Manipulatives Guide.