Premier 2 Way Ramp - ChromeThe door bar that solves a threshold height difference issue (2mm 9mm step) 2 Way Door Ramp for ceramic tiles, wood, laminate, non porous stone This 2 Way Ramp threshold is a quality flooring trim to manage a threshold height difference between floors from 2mm to 9mm. Suitable for flooring which has a hard, smooth, sealed surface e. g. ceramic tiles, many laminates & engineered woods, stone (providing it is sealed). Self adhesive strip on underside of