English to Spanish Marketing Transport / Transportation / Shipping Carta para un cliente

Buenas noches, como están? Espero que muy bien.

Estoy traduciendo una carta dirigida a un cliente de transportes. Se describe la entrega de una factura y los productos en inventario.

No entiendo la oración "Through Bolts" que se haya en el siguiente párrafo:
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"Thank you for the email.
In regards to your claim, I will deliver four Through Bolts on our next shipping schedule".
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Lo siguiente hace parte del texto pero no involucra la oración como tal:

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1. During Zaragoza Exhibition, support of €600 for each adverts was promised by both CEOs, and I’d like you to provide us with the detailed information regarding the advert schedule and relevant plans.


2. We were informed from our last visit, that the factory is going to be complete by September. Could you update us on the current status in regards with the factory? Also as promised, my CEO is planning to visit the factory site upon its completion, probably within the time frame of September 20th and October 10th.
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Gracias por leer y dar su opinión.