24um Step Standard with ZYGO Certification

The ISO 17025 certificate is exactly what I needed for my QA audits, and the 24um height is right on spec. Arrived with the paperwork in a sturdy case, no surprises at all.

The documentation that came with it is thorough enough that our QA team signed off without any back-and-forth, and the step height itself reads exactly to spec on our interferometer. A solid reference piece for anyone needing a traceable check.

The certification from an ISO 17025 lab gave me real confidence in the precision of this step standard. It mounted securely in my setup and the 24um step height matched my calibration checks exactly.