Review on 🐝 Enhanced Yellow Jacket 69702 Hose with Dual Injectors for AC/R Efficiency by Kimoni Arenas

I have used it to inject colorant in R410A 3.5 and 4 ton units. This worked well - be prepared to put a lot of pressure on the syringe. I'm guessing the mechanical advantage of the piston could be 8:1, but when you get 135psi on the bottom it's still a bit of a struggle. Delivered early in excellent condition at a great price.