Due to our product being "natural and time use sensitive generally returns or exchanges will normally be acceptable as long as notified within 30 days of delivery acceptance. Beyond 30 days and depending upon conditions or defect, generally NO RETURNS or exchanges are accepted. Though, we try to accommodate most customers requests because repeat business is our number one goal and customer loyalty is very important to us. Please no refunds on used played strings. If you accidently ordered the incorrect gauge string by mistake and you want to exchange it for the correct gauge this is allowed, but you must pay for the shipping. Additionally, depending upon the circumstance of the return there is a possible 20% restocking fee. The 20% restocking fee is strictly enforced on all sale items.