018421561321

• 0 — Number system
• 18421 — Manufacturer code
• 56132 — Product code
• 1 — Check digit (confirms the number is well-formed)

UPC-A ✓ Valid check digit

3inch x 5inch recipe/index card file

Search for 3inch x 5inch recipe/index card file on Amazon (or for the code 018421561321)