ARDL is working hard to maintain supply of our certified materials & test plaques. Unfortunately, with the current logistic delays due to issues with shipping and the ongoing pandemic, ARDL may not be able to fulfill all orders at this time. In some cases, material ingredients required for compounds are delayed or not available currently and there is not a set date when they will become available. We are also experiencing situations where materials have been discontinued completely. We appreciate your understanding and apologize for these issues causing unknown lead times. For the latest updates and any questions or concerns about an order, please reach out to our Compounding/Mixing department at firstname.lastname@example.org. We value your choosing ARDL for your slab and compound materials and hope these issues will be resolved soon.