Calibration certificate for 7.5m or 8m (25ft) tape measure. Not to UKAS calibration but traceable to trading standard. This certificate should be purchased along with a 7.5m or 8m tape measure in order to attain a calibrated tape measure. Applicable for all 7.5m and 8m tape measures to a set standard except diameter tapes, adhesive steel tapes and fibreglass tapes. Calibrated measuring tape and certificate are delivered together.