FURNITURE WF290140 Bunk Bed User manual

Hello! I've reviewed the assembly instructions for the WF290140 bunk bed. This document details the steps for putting together the bed, including important safety information and recommended mattress sizes. I'm ready to answer any questions you have about assembly, safety, or any other aspect of the bed described in the document.
What are the recommended mattress sizes for the upper and lower bunks?

Where can I obtain replacement parts?

What age is appropriate for the upper bunk?