The box says "square" at 0.0015 I would say they are. Revain's description says the square at 0.0008 isn't that close. Both glide a little rough, I see some light trying to match them. I'd happily give a lower start for the receipt info but for the price they will do the woodworking work. Again, don't buy if you want something more specific.
π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review
Digital multimeter RGK DM-12
6 Review
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review
π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review