Advent 2-In-1 Gap Tape - Double Sided 5m / 16ft 25mm Blade ADVAGT5025 Truly Unique Product Only Dual Function Normal and Internal Tape Measure in the World Simple. Accurate. No Need to Bend the bladeIts double-sided printed blade means it measures internal spaces with the same effortless precision as normal measurements. With normal measurements on the top of the blade, the reserve blade markings take into account the tape case dimensions, so when you measure internal spaces you simply butt the case up to the end and read the measurement.Length: 5m (16 ft) Blade width: 25mm (1 in) Measurement units: Metric and Imperial - EEC Class 2 Case material: ABS plastic with rubber outer Case colour: Black and Yellow ADVAGT5025