The mats are stepped to create a shadowbox look allowing room for the vinyl LP to be placed. The glass used is known as museum glass which is a framers grade UV protected clear acrylic which is unbreakable. This item is in the category "Entertainment Memorabilia\Music Memorabilia\Rock & Pop\Artists Q\Queen\Other Queen Memorabilia". The seller is "goldrecordoutlet56" and is located in this country: US. This item can be shipped worldwide.