
They are laser cut from steel and no other finishing has been done. The edges are sharp, it would be nice to do a little work with a vibrating deburring tool. This would remove the edge without sacrificing accuracy. However, they appear to be accurate and usable. Still a good deal.

π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review

Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review

π§ UEi Test Instruments DAFM3B Digital Multimeter
6 Review

π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review