The Mastercool 91553-EE is a red + blue protector set for 80 mm (3-1/8") manifold gauges. It helps licensed HVAC & refrigeration techs, apprentices and contractors absorb knocks, spot HP/LP fast and keep gauges looking new—a fair dinkum, low-cost upgrade that saves headaches on site.
Key features & trade benefits
- Shock-absorbing ribbed design — cushions bumps from rough handling so lenses are less likely to crack or scuff.
- Snug 80 mm fit — slides on quickly and stays put during transport and roof work.
- Colour-coded red/blue — instant HP/LP identification reduces mix-ups under pressure.
- Seconds to install — no tools, no dramas; get back to charging and diagnostics faster.
- Everyday durability — built for the daily grind on Aussie jobsites—bloody good value for protecting your kit.
Why this product matters
Real-world scenario: you’re on a windy Perth roof and your manifold nudges a duct, then kisses the deck. With these protectors, the shock is absorbed before it reaches the bezel—so you’re back to work and the job stays on schedule. She’ll be right because you planned ahead. For full manifold options, see our 80 mm Mastercool manifold gauge sets page.
Pro tip
Wipe the gauge bezel clean first. In cold weather, warm the protector in your hand for 20–30 seconds—it slides on easier and seats evenly around the lip.
Compatibility & system info
- Gauge size: fits 3-1/8" / 80 mm analogue gauges (LP or HP). Not for 70 mm gauges—measure before ordering.
- Manifolds: suits most Mastercool 80 mm sets and compatible 80 mm replacement gauges (check OD and bezel style).
- Use case: protection only—doesn’t change refrigerant compatibility; works across R32/R410A, R22, R134a, R404A manifolds.
Local note: from humid Brisbane plant rooms to hot Sydney rooftops, this little upgrade helps your gauges cop the knocks—no worries.
What’s included
- 1 × Red 80 mm gauge protector
- 1 × Blue 80 mm gauge protector
Specifications
| Model | 91553-EE |
| Fits gauge diameter | 3-1/8" (80 mm) |
| Colour coding | Red (HP), Blue (LP) |
| Install | Tool-free, slides over bezel |
| Design | Ribbed, shock-absorbing profile |
Warranty & returns
Covered by HVAC Shop’s standard warranty and returns policy for trade customers. If anything’s not up to scratch on arrival, reach out and our team will sort it quickly.
FAQs
Yes—if the gauge face is 3-1/8" (80 mm) with a standard bezel. If you’re replacing a low-side gauge, see our Mastercool MRBL1 80 mm low-side replacement gauge for a perfect pairing.
No—choose protectors sized for 70 mm if your manifold uses smaller oil-filled gauges (e.g., certain CO₂ R744 sets). Measure before purchase.
They’re designed for everyday handling protection. Keep away from harsh solvents and prolonged direct heat to maximise lifespan—same common-sense care you’d use with hoses and seals.
Related products
- Need a spare LP gauge? Check out the Mastercool MRBL1 80 mm low-side gauge — handy when you’re refreshing a well-used set.
- Swapping high-side? The Mastercool 80 mm HP gauge for R410A/R32 keeps readings crisp and consistent.
- Building a kit? Browse our 2-way & 4-way 80 mm manifold sets to match your workflow and refrigerants.