I bought this mainly because my last set of yellow jacket sensors didn't have that rubber protector. I discovered this the hard way when I kept pulling the hose off the valve and dumping some coolant after the hose was already on the manifold. This eventually caused the gauge on the underside to clog and the needle read 50psi when it was 70psi. So this one is way better than YJ's smaller sensor set. I think it's worth the money. I'm still not sure if I want to go digital because I see myself breaking one or getting wet etc. Analog is also very simple and reliable.
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