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FFR model characteristics.
| FFR Modela | Size | Shape |
|---|---|---|
| 3M 1860 | Standard | Cup |
| 3M 1860S | Small | |
| 3M 1870 | Standard (one size only) | Tri-fold |
| 3M 8000 | Standard | Cup |
| 3M 8210 | Standard | Cup |
| Moldex 2200 | Medium/Large | Cup |
| Moldex 2201 | Small |
3M Company, Inc. (St. Paul, MN); Moldex-Metric, Inc. (Culver City, CA)
