Women's Ra vs Rz Metrology | Surface Finish Engineer T-Shirt

100% Airlume Combed Ring-Spun CottonLightweight

  • Women's black t-shirt with Ra3.2 vs Rz16 roughness symbols and “If you know the difference” text.
  • STEM women's black tee with Ra3.2 vs Rz16 roughness symbols & “If you know the difference” text.
  • Side view of women's black tee with Ra3.2 vs Rz16 roughness symbols & “If you know the difference” text.
  • Back view of women's plain black t-shirt for engineers.
  • STEM women's navy tee with Ra3.2 vs Rz16 roughness symbols & “If you know the difference” text.
  • Side view of women's navy tee with Ra3.2 vs Rz16 roughness symbols & “If you know the difference” text.
  • Back view of women's plain navy t-shirt for engineers.
  • STEM women's white tee with Ra3.2 vs Rz16 roughness symbols & “If you know the difference” text.
  • Side view of women's white tee with Ra3.2 vs Rz16 roughness symbols & “If you know the difference” text.
  • Back view of women's plain navy t-shirt for engineers.
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€25,95 EUR
€25,95 EUR
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5.0 (6 store reviews)
Color
Size

Shipped from the EU

Size Guide

Height: 5'7" (169cm)

Chest circumference: 34.2" (87cm)

Waist circumference: 30.3" (77cm)

Hips: 37.8" (96cm)

Height: 5'9" (174cm)

Chest circumference: 35.8" (91cm)

Waist circumference: 30.7" (78cm)

Hips: 38.6" (98cm)

Spec Block

Design Story

Made for the engineer who knows Ra is just the average story — and Rz is where the real surface problems hide.

Any first-year engineering student can define Ra. It’s the arithmetic average. It’s the safe, comfortable number on every generic print. But Rz? Rz is the maximum peak-to-valley height. It’s the number that actually dictates whether your O-ring will seal or fail catastrophically under pressure. This design is a quiet gatekeeper. If someone reads your shirt and starts talking about contact surfaces and extreme deviations, you've found a peer. If they just stare blankly, you know exactly what level of tolerance they operate at. Deployed on our relaxed women's fit (Bella+Canvas 6400). A highly accurate piece of STEM clothing designed for those who understand the micro-mechanics of failure.

Use Case

Best For

Best for women in quality, metrology, or precision machining who worry about peak-to-valley, not just the marketing Ra on the drawing.

  • Women in mechanical engineering.
  • Female CNC programmers.
  • Metrologists.
  • Quality leads who refuse to accept "good enough" on a technical drawing.

Signal

Gift Guide

A laser-targeted gift for female quality engineers, inspectors, and machinists who’ve explained Ra vs Rz more times than they can count.

The ultimate gift for the female senior engineer who sends drawings back to junior staff because the surface finish specs are "too generic." If she demands precision, this is her new uniform.

Product Specifications

The Effortless Everyday Tee.

Designed for comfort without compromising style. We use the Bella+Canvas 6400, known for its relaxed silhouette and incredibly soft feel.

  • Fit & Feel: Relaxed Fit – A loose, comfortable cut that drapes beautifully. Runs true to size.
  • Premium Fabric: 100% Airlume combed & ring-spun cotton (4.2 oz/yd²). Pre-shrunk to minimize shrinkage.
  • Durability: Side-seamed construction for a flattering, structured look that lasts.
  • Ethical Sourcing: Dyed & Cut in the USA, assembled in Nicaragua/Honduras/Guatemala.
  • Printed with Care: Printed locally to ensure faster shipping and reduced carbon footprint.

Model Reference: Bella+Canvas 6400 (The ultimate relaxed tee).

Washing Instruction

  • Wash 30C Icon

    Wash cold (30°C / 86°F), inside out, with similar colors.

    Use mild detergent. No bleach. No softeners.

  • No Bleach Icon

    Do not use bleach. It can damage fiber integrity.

    Tip: Use oxygen-based stain removers if necessary.

  • Tumble Dry Low Icon

    Tumble dry Low or Hang dry (Recommended).

    Optimum: Flat air dry to preserve fiber tension.

  • Iron Low Icon

    Iron on Low Heat if needed. Do NOT iron prints.

    Fabric naturally resists wrinkling post-wash.

  • No Dry Clean Icon

    Do not dry clean. Chemical solvents damage prints.

  • Eco Ink Icon

    Water-based inks.

    A faint scent may be present after printing and typically dissipates after the first wash.

"Treat your gear like hardware. Maintain it."

Supply Chain Certifications (Component-Level)

The certifications below apply exclusively to the blank garment manufacturer and inks. The final printed product sold by grabNade is not independently certified.

• WRAP (Worldwide Responsible Accredited Production): The blank garment (Bella+Canvas 6400) is manufactured in WRAP-Platinum certified facilities, ensuring ethical, humane, and lawful conditions.
• FLA (Fair Labor Association): Bella+Canvas is an accredited FLA Participating Company, committed to upholding the highest labor standards globally.
• Eco-Friendly Dyes: The dyeing process uses bluesign®-approved dyes only, ensuring strict chemical safety and reduced water impact.
• Printing Safety: Our printing partners use water-based inks that are OEKO-TEX® Eco Passport certified, safe for adults and children.

Note: Any slight scent from the fixation agent is normal and disappears after the first wash.
More info: Supplier Certifications

Product Datasheet
StyleWomen's Relaxed Tee
FitWomen's · Relaxed Fit
Blank ReferenceBella + Canvas 6400
Third-Party Certifications , WRAP, FLA, bluesign®, OEKO-TEX® Eco Passport · View supplier certifications
ProductionPrint on demand · Ethical manufacturing
BrandgrabNade
Product Safety (EU / GPSR)

Age Restrictions

  • For adults only.

EU Warranty

  • 2 years statutory warranty in accordance with EU consumer law.

EU Product Safety & GPSR Compliance

In compliance with the General Product Safety Regulation (GPSR), grabNade and SINDEN VENTURES LIMITED ensure that all consumer products offered are safe and meet EU standards.

For any product safety related inquiries or concerns, please contact our EU representative:
📧 gpsr@sindenventures.com

320, rue Saint-Honoré, 75001 Paris, France
— or —
Markou Evgenikou 11, Mesa Geitonia, 4002, Limassol, Cyprus

View full details

> Featured In

Ra vs Rz: What's the real Difference?

Ra vs Rz: What's the real Difference?

What is the real difference between Ra and Rz surface roughness? While Ra (Arithmetic Mean Roughness) provides a general average, Rz (Mean Roughness Depth) captures...

[ READ ARTICLE ]