Stone plastic core and aluminum bottom, 4mm thickness is much thicker than most peel & stick tile, not easy to get discolored with years Share Tweet Pin it Previous post Diflart Peel and Stick Backsplash Tile, Faux White Marble with Gold Metal Next post Diflart 10 Sheets Peel and Stick Backsplash Tile, Faux White Marble with Gold Metal, Self Adhesive Chevron Wall Tile