You can purchase B reference keys for your letter box / postbox / mailbox directly from our online store below by clicking the buy button. You will also need to type the key reference accurately in the required field. Replacement keys are sold in packs of three, and cost includes Recorded Delivery (insured for loss / non-delivery) within UK. Orders from overseas may incur an additional postal charge. Key references run from B001 to B508. For orders received before 13:00 Monday to Friday, goods will be despatched same business day. Availability - in-stock. Should you require any further information, please call Post Boxes UK today on +44 (0)1922 218218. Alternatively, your enquiry can be emailed to [email protected] Thank you. Please note that Post Boxes UK can not be held liable for keys supplied which do not work with the intended lock. Refunds cannot be give on cut keys. Post Boxes UK cannot be held responsible for keys delivered to a physical post box, letterbox or mailbox, regardless of method of sending. All keys supplied are done in good faith on the assumption that the buyer is also acting in good faith. Please ensure that you type the correct key reference when ordering.