Schluter®-TROBA-LEVEL-AP 1 leveling shims (height = 1/32" [1 mm]) are used to compensate for variations in substrate and/or paver thickness by adjusting the corners of each paver tile. TROBA-LEVEL-AP 1 are designed to lock between the joint spacer tabs of the TROBA-LEVEL-LV 3/-PL 10/-PLV 60 paver supports and can be stacked up to 10 shims high.