021734201013

• 0 — Number system
• 21734 — Manufacturer code
• 20101 — Product code
• 3 — Check digit (confirms the number is well-formed)

UPC-A ✓ Valid check digit

• 021734001026 — Socks diab s/kndsplay dl
• 021734201037 — Socks men reg medicl ctu dl
• 021734201020 — Knee 15-21 tf medicl ctu dl

Pantyhose tf medicl ctu dl

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