Returned items must receive prior approval. Please state reason for the return and invoice number and date. Special orders are not returnable. Prism Research Glass, Inc. makes every effort to prevent breakage during shipment. Should a breakage occur, please report the damage to the carrier immediately. Do not discard packaging. Should a shortage in your shipment occur, contact Prism Research Glass immediately. Claims must be made within 10 working days or receipt of order.