These products comply with IEC, UL, CSA, VDE, and other international requirements. The NFB-C1, BTA-C1 & BTA-C2 copper blocks inclue ISO 17025 accredited, NIST-traceable certificates and 90 day warranties. For our valued customer, we also include packing and handling! Calibration Measurement Data Options are available, including Standard Data and Data with Uncertainty Measurements. Each of the devices are high precision manufactured in the USA, cases are available for an additional charge.