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What's the Difference Between Similar Part Numbers?

Part numbers that look similar often have important differences that affect fit and function.

Common Differences Include:

Length:
- Example: RR 110-I (6 feet) vs. RR 110-J (8 feet)
- Always check the length specification for your application

Steel Core:
- Parts ending in "-M" often indicate a steel core (molded)
- Example: VS 3 (extrusion only) vs. VS 3-M (with steel core, molded to fit)
- Steel core provides better rigidity and hold

Molded Ends:
- Some seals have molded/finished ends, others are straight-cut
- Molded ends are designed for specific applications

Body Style Variations:
- Some part numbers are for hardtops, others for sedans or convertibles
- Read descriptions carefully

How to Choose:

  1. Read the full product description
  2. Check dimensions and specifications
  3. Compare to your original part if possible
  4. Contact us if you're unsure:
  5. 1-800-878-2237
  6. help@metrommp.com
Jan 3, 2026

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