Published 14 Sep 2026 · WYD Silicone, Bao'an
Market
Switzerland
Envelope
~64 x 36 mm
Wall
4 mm
Sealing lip
1 mm
Shore / color
A 30 black
Sample loop
Fail → second set OK
No wearable photos on this URL. Brand and drawing stills were not cleared; we will not paste a random earbud sleeve. What we can publish: STEP as the manufacturing reference (STL for view only), black Shore A 30, about 64 x 36 mm, 4 mm wall, 1 mm sealing lip, 2 x 2 mm hollow chamber, radial clearance noted at 1.8-2.0 mm. First molded set was defective. Tooling/process was corrected. Second set passed visual and fit.
Fit features beat the silhouette
The accessory had to stretch, seat, and seal on a real product. Lip thickness, chamber, local wall, flash on the fit face, and Shore A 30 all mattered more than the outer outline. STEP kept controlled faces for those lips; STL alone is a poor source for a 1 mm seal.
First-article fail is why you sample. Shipping the first flashy set as “production” would have locked the wrong lip into steel. We do not invent a cycle life or leak-test number that is not in the archive.
What to send for a similar accessory
- STEP of the silicone part plus the mating product envelope if you can share it
- Lip / chamber / clearance notes, Shore and color
- Which faces are flash-critical
- First-article qty and what “fit pass” means on your bench
FAQ
Why no photo?
NDA and no cleared still. An unrelated wearable image would be a fake proof.
Is Shore A 30 standard for ear accessories?
It was this customer's fit target. Copying it onto another lip geometry is a new validation.
STL enough?
Not for a 1 mm sealing lip. Use STEP as the tool reference.
Related: electronics & wearables · product development · OEM sample-before-print · send the RFQ pack.