Schluter Kerdi-Board-ZT TAB WASHER GALV STEEL 1-1/4″ (1000) This is a set of steel washers used in conjunction with KERDI-BOARD-ZS coarse wood screws to fasten Schluter-KERDI-BOARD to stud framing. Product Compatibility Schluter-KERDI-BOARD Building Panels Schluter-KERDI-BOARD-V Grooved Building Panels Schluter-KERDI-BOARD-E Building Panels Schluter-KERDI-BOARD-U Building Panels Schluter-KERDI-BOARD-SN Shower Niches Size Quantity: 1000 Manufacturer Part # (MPN) KBZT32Z/L Payments Shipping Returns