Cat Mate Wall Liner Paintable surface to any color Multiple sections can be added together Works with 304, 309, 234, 235 doors Dimensions: Wall Thickness : # of Liners Required 2-4": 1 liner, 4-6": 2 liners, 6-8": 3 liners, 8-10": 4 liners, 10-12": 5 liners Directions: Use an additional Wall Liner for each 2" of wall thickness Paintable surface to any color Multiple sections can be added together Works with 304, 309, 234, 235 doors Works with 304, 309, 234, 235 doors Paintable surface to any color