789398427919

• 7 — Number system
• 89398 — Manufacturer code
• 42791 — Product code
• 9 — Check digit (confirms the number is well-formed)

UPC-A ✓ Valid check digit

• 789398427520 — Aviation Headset Mic Muff For David Clark, Avcomm ,Light Speed (2Pcs)

Aviation Headset Mic Muff For David Clark, Avcomm ,M-87 (2Pcs)

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