Ball Bearing Drawer Runners One pair for one drawer 600 mm zinc plated 12.7 mm thickness H=45 mm / 1 13/16" side mounting or 45 mm groove ( 1 13/16") quick release system (by pressing lever) for drawer removal 30 kg loading capacity / 60 pounds Soft Close System telescopic slider construction rubber brake preventing from automatic opening possibility of dismantling part of slider which makes slides mounting easier