1. Duplicate the Dynojet's discount code you desire from this page and click to get code.
2. You will subsequently see the offer code appear and get automatically copied to your clipboard.
3. You'll then need to return to the Dynojet's shopping checkout page, where you'll find the promotional code box and paste the coupon code you just copied into it.
4. Ultimately, by clicking 'Apply Code', you will be able to see the discount amount on your existing order.