Do these couplers have a shut off on the top of them?

Yes, the red or blue part twists to open or close the valve.

Do they make car-side hi/low pressure fitting with threads? So you can easily attach these to the gauge set when not in use?

Anthony, If I understand what you want to do, you want to attach your couplers to your a/c lines and leave them there, and when not in use you want to attach those to the "storage" fittings on the backside of your gauge set. I did some quick research and I believe they do make what you want and Amazon carries them. What you need is a set of R12 to R134a adapters. They should have a female SAE 1/4" flare R12 side (to attach to the "storage" fittings on the back of the gauges) and male quick connect R134a side to attach to your couplers, obviously you will need two, one for the low side and one for the high side. It looks like they are sold both separately and in sets. Just search Amazon for "R12 to R134a adapter" and you should find what you need. It's a good thing there's still a bunch of us old timers out there with old cars and old R12 systems that need to be converted to R134a systems. Just remember the gauge fittings are SAE 1/4", male flare, and I think the quick connect fittings are standardized although I 'll have to research their designated sizes/names. These may also be available at your local auto parts store. Hope this helps........

how many of item ROB18192 is in stock? Thanks.

If you meant how many in a packag I beleieve 2 Well both red and blue. They may not work well with certain hoses you may end up buying adapter or buy robin hoses with it

Says it ships from amazon in 1-3 months.. is that pretty accurate?

it didnt take that long when i ordered mine

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🔧 Connect with confidence — the pro’s choice for flawless A/C service!

SECURE 6 BALL GRIP - Experience unmatched stability with a 6-ball coupler design that outperforms standard 4-ball models.
DUAL SIDED VERSATILITY - Includes both low-side and high-side manual couplers for comprehensive R-134a A/C system service.
SPACE SAVVY COMPACT BUILD - Engineered to fit effortlessly into tight engine compartments and retrofit scenarios.
SAFETY FIRST QUICK CONNECT - Integral safety sleeve prevents injury and refrigerant loss during disconnection under pressure.
DURABLE CHROME PLATED BRASS - Rugged construction ensures long-lasting performance and reliability in demanding environments.

The Robinair 18192 R-134A Manual Replacement Coupler Set offers a professional-grade solution for connecting Enviro-Guard hoses to automotive R-134a A/C service ports. Featuring a quick-connect design with an integral safety sleeve, it prevents injury and refrigerant loss under pressure. Its compact form factor fits tight spaces, while the 6-ball coupler design ensures a superior, stable grip. This set includes both low-side and high-side couplers, crafted from durable chrome-plated brass for long-lasting reliability.

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Manufacturer	Robinair
Brand	Robinair
Model	18192 R-134A Manual Replacement Coupler Set
Item Weight	0.008 ounces
Product Dimensions	3.1 x 10.4 x 0.2 inches
Item model number	18192
Is Discontinued By Manufacturer	No
Exterior	Brass, Chrome
Manufacturer Part Number	18192

Robinair18192 R-134A Manual Replacement Coupler Set

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