Yes, you may change or cancel your order depending on the status of your order and our policies. If you wish to change or cancel your order, please contact our customer service team at [email protected] as soon as possible with your order number and the details of the change or cancellation you would like to make. We will do our best to accommodate your request, but please note that some changes or cancellations may not be possible if your order has already been shipped or is in the process of being fulfilled. If you order any Made to Order (MTO) products, such as ion kits, arrays, or assembled constant airflow regulators with boxes, please be aware that there will be a 25% restocking fee if you need to return the item.