You may cancel or change all purchase orders placed for catalog and standard products within seventy-two (72) hours of placing order unless we have already shipped your order. Order of custom and non-standard products may be cancelled within seventy-two (72) hours of placing order unless we have already begun manufacture of the custom order and/ or shipped your order. See our Terms and Conditions (link - https://www.geminibio.com/terms-conditions/) to read more. Please contact our customer service team at 1-800-543-6464 or customerservice@geminibio.com for assistance with your cancellation request.