Compatible with 21 mm lug watches (select)
SMX02A Rubber Band 21 mm Black
-style SMX02A rubber strap — 21 mm black. Independent of FKM32 / FKM34 / FKM29 / FKM13 rally listings.
Stock: 0 · Not in LIVE catalog · Checkout blocked for this SKU
Draft listing for Owner visual review. Gallery uses peer PDP product photos (logo-scrubbed). Coming soon — not sellable. Draft anchor $62.00 (white-label at peer SMX02A; SKU draft field only; global price policy untouched)
Not sure about fit? Try Fit Finder
Highlights
- SMX02A -style rubber strap — 21 mm black
- Curved / integrated end profile (select)
- Independent of FKM32 / FKM34 / FKM29 / FKM13 rally
- Third-party accessory — competitor trademarks not used in customer copy
- Hardware finish options (select)
- 1-year warranty when the listing goes live
Built for the day
SMX
02A
Profile.
21
mm
Fit.
Black
Rubber
Finish.
Compatibility
Designed as a third-party accessory. WatchGearLab is not affiliated with the watch brand named for compatibility.
Exact mold / lug mapping will be verified on sample units before this page goes live.
Materials & Construction
Strap
Rubber / elastomer (select).
Hardware
Stainless / PVD options (select).
Ends
-style profile (select).
Sizing & Fit
Lug
21 mm when live.
Wrist
Confirm length when live.
Size Chart
Draft guide for Coming soon review. Hole count / magnetic travel and exact wrist ranges will be confirmed on sample units before this SKU goes live. Measure your wrist where the band sits, not over the watch case.
| Watch case | Select on this page | Approx. wrist (mm) | Approx. wrist (in) |
|---|---|---|---|
| 21 mm SMX02A | Black | S–M | M–L |
- Check your watch case size in Settings → General → About (or the case back).
- Choose the matching case-size pill above.
- If you are between lengths, prefer the larger case-size option when available — samples will lock final length.
Not sure? Try Fit Finder. Compatible with Apple Watch only — not Apple Official.
What's Included
- 1× SMX02A Rubber Band 21 mm Black
- Fit note (English)
Product photos show a typical concept layout. Final colors may vary within the stated assortment.
Care
Rinse after sweat; mild soap OK; air dry.
Shipping & Returns
When this SKU launches: free US shipping on orders $35 or more. Standard delivery 5–8 business days. 30-day returns on unused items in original packaging. 1-year limited warranty on manufacturing defects.
Frequently Asked Questions
Is this a third-party brand product?
Is it an FKM series strap?
Can I buy this today?
What about returns / warranty?
Trademark notice
Watch names appear only for compatibility. WatchGearLab is not affiliated with Seiko or Citizen.