ALL SHELVES ARE 3/8 OF AN INCH THICK, CLEAR, TEMPERED GLASS. UNLESS NOTED DIFFERENTLY. TRIANGLE TRIANGLE 12 X 12 T12$37.50 TRIANGLE 16 X 16 T16$49.90 TRIANGLE 20 X 20 T20$59.50 TRIANGLE 24 X 24 T24$70.50 ADHESIVE CAULKDON'T FORGET TO GET THE ADHESIVE CAULK! IT IS THE ONLY SUPPLY NEEDED FOR THE INSTALLATION OF THE GLASS CORNER SHELVES!