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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applicable price per Cartridge. Vapotherm shall deliver all purchase orders by facsimile, or by one of the means specified in Section 14.8 for giving notice, to Medica at the following address and facsimile number or as otherwise instructed by Medica: Medica S.p.A. Via Degli Artigiani, 7 41036 Medolla (MO) Italy Attention: Daniele Giubertoni MKTG & Sales Manager Facsimile: 39-0535-52605 E-mail: daniele.giubertoni@medica.it (b) Vapotherm shall order for delivery in any given month an aggregate number of Cartridges equal to at least [* * *]% of the final amount forecast for that month in the Rolling Forecasts (that quantity, the "Final Forecast Quantity"). Vapotherm may order for delivery in any given Quarter an aggregate quantity of Cartridge not exceeding [* * *]% of the Final Forecast Quantity. Only with Medica's written consent may Vapotherm order for delivery in any given Quarter an aggregate number of Cartridges exceeding [* * *]% of the aggregate Final Forecast Quantity for the months in such Quarter. -2- [* * *] = Certain confidential information contained in this document, marked by brackets, has been omitted and filed separately with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. (c) Vapotherm shall deliver each purchase order for quantities of the Cartridge at least [* * *] in advance of the delivery date specified in that purchase order. (d) If Vapotherm delivers any purchase order with less lead time than is required under Section 3.2(c), then Medica shall use [* * *] efforts to fill that purchase order but will not be liable to Vapotherm if despite those best efforts they fail to do so. (e) Medica shall acknowledge and accept in writing on behalf of Medica any purchase order that Vapotherm places for Cartridges. Any such purchase order will be deemed accepted by Medica if Medica does not reject it by written notice to Vapotherm delivered within [* * *] Business Days of Medica's receiving that purchase order. Medica may not reject any purchase order that complies with the provisions of Article 3. If the terms of any purchase are inconsistent with the terms of this Agreement, the terms of this Agreement will control. 3.3 Delivery. Each shipment of Cartridges will be delivered by [* * *] to the applicable Vapotherm manufacturing facility or retained in Medica's warehouse facility, in accordance with Vapotherm instructions for each shipment. Medica shall deliver by the delivery date specified in a purchase order all of the Cartridges specified in that purchase order. Vapotherm is only required to pay for Cartridges actually delivered. Medica shall make shipping arrangements with carriers designated in writing by Vapotherm from the [* * *] point to points specified by Vapotherm, under the arrangements that Vapotherm has with those carriers. 3.4 [* * *] 3.5 Delay in Delivery. If for any reason other than an Event of Force Majeure, Medica delivers any shipment of Cartridges later than the date of delivery set out in the applicable purchase order, Vapotherm will be entitled to the following as an alternative, in its sole discretion, to its rights under Section 3.6 and Section 13.2(a): (1) a [* * *]% reduction in the price of each Cartridge in the shipment for every [* * *] the shipment is delayed (from the Required Ship Date specified in the Purchase Order) to a maximum of [* * *]%. 3.6 Delivery Default Rights. If more than [* * *] days have passed since the delivery date for any Cartridges and Medica has, for any reason other than an Event of Force Majeure, failed to deliver those Cartridges, then, in addition to any other remedies it might have under this Agreement or by law, Vapotherm may cancel that purchase order or the portion thereof relating to those cartridges, as applicable. 3.7 Invoices and Payment Terms. On delivery by Medica of a shipment of Cartridges in accordance with Section 3.3, Medica shall issue to Vapotherm an invoice for that shipment stating a price consistent with the terms of this Agreement. Vapotherm shall pay each such invoice in full within [* * *] Calendar Days from the date of invoice, unless Vapotherm has rejected the shipment in question in accordance with Section 4.2. -3- [* * *] = Certain confidential information contained in this document, marked by brackets, has been omitted and filed separately with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933, as amended. 3.8 Delay in Payment. Upon delay of payment
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Extract the exact clause related to "Warranty Duration" from the excerpt above.