Yellow Jacket manifold gauge protective boots for 3 1/8 in gauges — elastomer shock‑absorbing, dust‑resistant set

Yellow Jacket 49190 is a set of durable 3 1/8-inch protective boots designed to shield HVAC manifold gauges from bumps, dirt, and wear during jobsite use.

These gauge boots provide a simple, effective layer of protection for manifold gauges commonly used in refrigeration and HVAC service. Built to fit 3 1/8-inch diameter instruments, the set helps extend tool life by absorbing knocks, guarding against scuffs, and keeping debris away from dials and connectors. The Yellow Jacket 49190 boots are a practical accessory for technicians who want to preserve the accuracy and appearance of their gauges without altering instrument function.

Will these boots fit my 3 1/8-inch manifold gauge?

Yes — the Yellow Jacket 49190 boots are sized specifically for gauges with a 3 1/8-inch diameter. They slide over the instrument face and body without interfering with needle movement or valve access.

• Designed for 3 1/8 in (approx. 79 mm) gauge faces
• Flexible material accommodates slight dimensional variations
• Does not obstruct valve knobs, hoses, or fittings

How do these boots protect my gauges on the job?

The boots cushion impacts, reduce surface abrasion, and block dust and grime from settling into crevices. Their snug fit keeps the gauge secure while allowing full visibility of the dial and easy access to connections.

• Shock-absorbing material reduces damage from drops and bangs
• Protects glass and bezel from scratches and chips
• Minimizes dirt and moisture contact with the gauge face and ports

What material and durability can I expect?

These Yellow Jacket boots are molded from resilient, jobsite-ready elastomer that resists tearing and compressive wear. Although manufactured in China, the components meet common industry expectations for field accessories and are intended for regular service use.

• Elastomer construction for flexibility and impact resistance
• Manufactured for repeated installation and removal
• Designed to maintain shape under typical temperature ranges encountered during service

How easy is installation and maintenance?

Installation is straightforward: stretch the boot over the gauge until it seats around the bezel and body. Cleaning requires only mild soap and water; avoid harsh solvents that could degrade the elastomer.

• Quick slip-on fit for fast field use
• Hand-cleanable with mild detergent and water
• Store away from prolonged ultraviolet exposure to preserve material life

Who is this for: Technicians, contractors, and maintenance professionals who use 3 1/8-inch manifold gauges and want a low-cost way to protect their instruments. Ideal for those who transport tools between jobs, work in dusty or congested mechanical spaces, or simply want to extend gauge life and maintain readable dials. The Yellow Jacket 49190 boot set is an accessory that brings added durability and on-the-job convenience without changing how you use your equipment.