Our flat copper electrodes are 18mm by 100mm, or approximately .75" by 4". They are useful in electrolysis experiments and many others.
WARNING: This product can expose you to chemicals including nickel (nickel electrodes only) and lead (all metal electrodes), which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.