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Cole-Parmer Masterflex Peristaltic Pump 7523-90 w/ 2x Easy-Load II Pump Heads30-day return warranty Feedback NO NEED FOR NEGATIVE OR NEUTRAL FEEDBACK. If there is a problem, please contact us before leaving feedback. If an item arrived not as described or you are not satisfied with the item or shipping time, we will resolve all issues. We strive for a 5-star detailed seller rating and work hard for our customer’s satisfaction by providing a smooth transaction. Payment Full payment is due within 3 days if needed, for specific payment needs or company invoice please contact us. Shipping -- Items ship within 1-2 business days after payment. -- We ship with USPS FedEx UPS -- If you wish to use your FedEx UPS account# please let us know upon purchase. -- We ship Worldwide. Buyer responsible for customs/duty import charges.Return PolicyIf item arrives damaged or not as described or due to any error on our part, we will refund the full amount with shipping charges both ways. If buyer decides to return an item for any other reason, in this case the buyer pays return shipping plus a restocking fee.