Review on 🔧 Spurtar Automatic Tire Deflator Kit - 6-30 PSI Tyre Deflator for Car, Truck, Motorcycle, Jeep, and ATV (4 Pack + Storage Bag) by Rud Starks

For the price they work great! Better than expected. I set each one at 18psi first and they are all within 1psi give or take. Lubricate the internal parts with a little silicone oil or a liquid lubricant. A tiny speck of blue thread on the stop ring once you are satisfied with the required psi pressure.