All UKAS Slotted Hanger Weights are calibrated here at JWS to the specification listed below:
UKAS Test Weights are Stamped with a serial number and then sent to Trading Standard to be tested and Certificated.
They must have a Serial Number or some kind of identifying mark on each weight. This number can be stenciled or stamped onto the weight.
Only one UKAS Certificate is needed per batch of weights on the same order. Please remember to add this to your basket available back on the Test Weights page.