ENPROCON, Inc. guarantees all ENDURALL ™ material and workmanship. If not satisfied with any product, return the unused product within 30 days for full refund or exchange. Call for RGA#, pack product securely, enclose a copy of invoice with explanation, and ship via UPS or insured parcel post. No restocking charge applies if returned within 30 days. A 15% restock charge applies after 30 days.