Roblox Decal Library. It will show you a list of all the relevant decals. When you enter a decal code, roblox will open the library page of the corresponding decal.
This id is used to fetch the library page of the corresponding decal. Every decal in roblox is attached with a unique numeric id. The library is a collection of freely available packages, decals, audio, and plugins that you can use to help create the experience of your dreams!