In my opinion, this is a must. If one is spending a premium amount for a fine delicate instrument (Moroso Tire gauge)then it makes sense in my book to protect that investment by purchasing a rubber cover. In case of an accidental knock, which can easily happen, you'll be happy that for a few dollars, your instrument in most cases, depending on the severity of the knock,will still function-plus it is easy to install.

I think the gauges should come with these already. Don't follow the installation directions, just lube it with some soapy water; there's enough "give" in the rubber to work it up over the hose and onto the gauge without disassembling.

I'll state the obvious - it's too expensive and should have been included with the Moroso 89560 tire pressure gauge. However, if you don't buy it you'll wish you would have because the gauges have a light/cheap feeling to them (not the whole gauge - just the head). I topped off 8 tires on my two cars this evening, and for every tire I put the gauge down on the ground twice (to check before and after). If I didn't have this big rubber cover surrounding my gauge it would have been scratched up by now. The cover sticks out over the edge of the gauge head and protects your investment very well.

Also, I listened to a previous reviewer and decided not to disassemble the gauge to put the rubber cover on. It was flexible enough to stretch over all parts of the gauge without causing any damage to the gauge or the cover, and no lubrication was needed.

Gauge seems very beefy and made of quality material. It fits well. It should last a long time.

This is essential I think for the air gauge, but should be included with the gauge.