system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
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new version or upgrade must be of a material nature whereby the existing Products held by Distributor are considered obsolete. All Products must be returned undamaged, and all shipping charges -7- shall be paid by Distributor. This clause does not apply to any Products that have been in Distributor's inventory for more that one hundred and eighty (180) calendar days. 8.3. Damaged Products. Promptly upon the receipt of a shipment of Products, Distributor shall inspect the Products for damage or shortage. Within ten (10) calendar days of receipt of the shipment, Distributor shall notify Vendor of any damage or shortage. As soon as commercially practical after receipt of notice, Vendor shall make complete any shipment in short supply. Any Products damaged in shipment shall be returned to Vendor along with documentation of the damage within thirty (30) calendar days of receipt by Distributor, and Vendor will reimburse Distributor for the costs of freight reasonably incurred by Distributor in returning the Products to Vendor. If Vendor finds any Products returned for damage to not be damaged, Distributor shall be subject to a restocking fee equal to fifteen percent (15%) original purchase price of the non-damaged Products. 8.4. Defective Products. Distributor may, no later than one hundred and twenty (120) calendar days after a Product is sold by Distributor to a customer, return to Vendor, at Distributor's expense, any Product received by Distributor from Vendor during the 120-day period prior to such return, which Distributor or its customer believes to be defective. In the event that such Product is defective, i.e., the failure of a Product to operate in accordance with its published specifications, Vendor shall: 8.4.1. Reimburse Distributor for the costs of freight reasonably incurred by Distributor in returning the Product to Vendor; and 8.4.2. Issue Distributor a credit against future purchases in an amount equal to the purchase price paid by Distributor for the Product or, as requested by Distributor, full reimbursement for the defective Products. 9. PRODUCT TESTING AND RESULTS Whereas Vendor has organized and received the results from product testing with respect to the Products, Vendor hereby agrees to make available to Distributor the results of such product testing and grants to Distributor the right to use such results in its promotional materials; provided, however, Distributor may only use such results if Distributor complies with the applicable terms of use as provided by the institution, organization or other person that organized and conducted the relevant product testing. Conversely, in the event that Distributor organizes and receives the results from product testing with respect to the Products, Distributor hereby agrees to make available to Vendor the results of such product testing and grants to Vendor the right to use such results in its promotional materials. 10. REPRESENTATIONS AND WARRANTIES OF VENDOR Vendor represents and warrants to Distributor as follows: 10.1. Existence. Vendor is a corporation duly organized, validly existing and in good standing under the laws of the State of Nevada. 10.2. Authorization; Binding Agreement. This Agreement constitutes valid and legally binding obligations of Vendor, enforceable in accordance with its terms, except, in each case, as such enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium, or other laws relating to or affecting the enforcement of creditors' rights generally in effect from time to time and by general principles of equity. Vendor has full corporate power and authority to enter into this Agreement. -8- 10.3. Product Warranty. Vendor warrants to Distributor that the Products shall perform without manufacturing failure and are fit for purpose. Distributor, in cooperation with Vendor will remedy any defect in the Product in accordance with Section 8. 10.4. Spare Products and Parts. Vendor will provide an initial supply of spare Products and parts as Distributor may reasonably required in accordance with Sections 8 and 10.3 to permit Distributor to offer a six-month warranty on the Products to customers and to enable Distributor to provide a warranty service to customers. The initial spare Products and parts to be provided pursuant to this Section 10.4 shall be at no additional charge to the Distributor; provided, however, any additional Products and parts unrelated to this Section 10.4 shall be purchased by Distributor. 10.5. Litigation. Other than as disclosed in Vendor's filings made with the United States Securities and Exchange Commission, including without limitation the legal proceedings involving Shuffle Master, Inc., Vendor is not aware of any action, arbitration, suit, proceeding or investigation pending, or to the knowledge of Vendor, threatened against Vendor, that would have a material
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Extract the exact clause related to "Warranty Duration" from the excerpt above.

assistant: Distributor may, no later than one hundred and twenty (120) calendar days after a Product is sold by Distributor to a customer, return to Vendor, at Distributor's expense, any Product received by Distributor from Vendor during the 120-day period prior to such return, which Distributor or its customer believes to be defective.