slimlite Self Cleaning Standard Cavity Widths: 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm, 10.0mm Standard overall Perimeter Seal Depth - 5.0mm (overall tolerances + or - 1mm) Minimum timber rebate depth - 7.0mm Section Standard astragal or glazing bars with Slimlite (not to scale)NoteGlazing sizes should be less than 2mm - 3mm from height and 2mm - 3mm from width. Allowance should be made where opening sizes are irregular.