Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
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For more information, visit www.P65Warnings.ca.gov.
Reliable Tool for R12 Valve Core ServiceThe Mastercool 91290 Universal Valve Core Remover is a compact service tool for R12 and R134a systems, ideal for use during system evacuation or repair. With a double-ended design, this tool includes hardened steel shafts for Standard and GM Large Bore valve cores-making it a great choice for older vehicles and GM applications.Designed for non-pressurized systems, the 91290 delivers durability, simplicity, and excellent value in a technician-friendly format.What's Included: Dual-ended valve core remover/installer tool Hardened steel shafts for Standard and GM Large Bore valve cores
Just used this valve core remover on my old car and it worked perfectly for the R12 system. The construction feels durable and the size is just right. Very happy with my purchase!
J
Javier Martinez
Essential tool for HVAC work
I bought this Mastercool valve core remover for my HVAC repairs and it's been a real lifesaver. The double-ended feature makes it super versatile for both R12 and GM large bore valves. Definitely a solid build too!
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Emily Chen
Good tool but delivery took ages
The Mastercool 91290 works well for what it’s designed for, but I was frustrated with how long it took to arrive. It feels sturdy and gets the job done, just wish I didn’t have to wait so long!
M
Mark Johnson
Not as easy to use as I'd hoped
I had some trouble using the double-ended tool on GM large bore valve cores. It gets the job done, but sometimes I need to apply a little extra force. It’s okay, but not my favorite in the toolbox.
L
Liam O'Connor
Arrived damaged — not impressed
I was really looking forward to using the Mastercool tool, but it arrived with a bent end. I tried to fix it, but it just doesn’t work right now. Disappointing experience, to say the least.
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FAQs
Have a question ? We are here to help.
Is the shipping free?
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
