Genuine EDGE™ Coverage Cups Replacement Diffuser
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Need Help Choosing the Right Setup?
Choosing the right equipment depends on your application, material, and welding conditions.
- For more control and precision → use smaller components and tighter setups
- For more coverage and larger welds → use larger setups and higher gas flow
- For high-heat applications (like aluminum) → use materials designed to handle increased temperatures
- For tight spaces → use more compact profiles
If you’re unsure what you need, start with a complete setup or kit and build from there.
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Genuine EDGE™ Precision Diffuser – Replacement Diffusers for EDGE Coverage TIG Cup Systems
Keep your EDGE Coverage TIG Cup System performing at its best with a Genuine EDGE™ Precision Diffuser. These replacement diffusers are designed specifically for the EDGE Coverage Series of TIG Cups and are manufactured for proper compatibility with each cup size.
Compatible With
- #12 Coverage Cup (Quartz or Pyrex)
- #12 Shorty (Quartz or Pyrex)
- #12 Super Shorty (Quartz or Pyrex)
- 12 Narrow Pyrex only
- #15 Coverage Cup (Pyrex)
- #18 Coverage Cup (Pyrex)
- #21 Coverage Cup (Pyrex)
- #23 Coverage Cup (Pyrex)
Note: The #12, #12 Shorty, and #12 Super Shorty all use the same diffuser and are available in Quartz or Pyrex. Sizes #15 through #23 are Pyrex only.
Available Options
Coverage Cup Size
- #12 / #12S / #12SS – Quartz
- #12 / #12S / #12SS – Pyrex
- #15
- #18
- #21
- #23
Tungsten Opening
- 1/16" (1.6 mm)
- 3/32" (2.4 mm)
- 1/8" (3.2 mm)
- 5/32" (4.0 mm)
Please select both your Coverage Cup size and tungsten size before ordering.
Replace with Genuine EDGE™ Components
Replacing a damaged or worn diffuser helps maintain proper compatibility and keeps your EDGE Coverage TIG Cup System operating as designed.
For the best fit and performance, always use Genuine EDGE™ Precision Diffusers with genuine EDGE cups and components.
Need help identifying your diffuser? Contact our team—we'll help you select the correct replacement.