| Grade 4 Qualitative Filter Paper Standard Grade, circle, 150 mm | |
| Cellulose | |
| 20 to 25 μm | |
| Fast | |
| Grade 4 | |
| 100 Pack | |
| Qualitative Filter Paper | |
| 5.9 in. |
| Disc | |
| Coarse particles and gelatinous precipitates | |
| 37 sec. | |
| A standard grade filter used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical. | |
| Medium | |
| 210 μm | |
| Ø 150 mm | |
| 150 mm |


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