u/FlatwormImportant

I recently purchased two basic card gradings and added the submission kit because it seemed convenient. After seeing a YouTube video about the submission kit, i think it would make a solid storage box and I want to keep it. Am I allowed to do this, and just slap the prepaid label on a normal ups box and ship that? The cards im grading are not super expensive, so I think a top loader taped between two slabs of cardboard would be sufficient