10 single units per set. Guaranteed to work, eligible for a refund/replacement.
Our subsidiary website currently offers this item at $63 per box.
Please copy/paste the link:
https://nmenterprises1.myshopify.com/products/tandem-autosoft-xc-6mm-23in-1
If you have any issues searching for our new website, please contact me directly nmenterprises1@yahoo.com