Product Description
Filter faster with a funnel shaped to use more of your filter paper. Folded paper forms a 60 degree cone, so in a standard 60 degree funnel only the area near the tip filters well. The slightly steeper 58 degree angle suspends the paper by its top edge, opening up far more of the cone to flow.
This listing is for Kimble catalog number 28900-55: KONTES 58° 6" Long Stem Funnels, 36 mL, Case of 48. These long stem funnels have heavy uniform walls, strong molded rims and fire-polished 150 mm stems for long service life. They resist chemical attack and mechanical and thermal shock. Designed from ASTM E1095, Type I, Class B, they are made from low extractable 33 expansion borosilicate glass in 36, 60, 90 and 225 mL capacities. Order it from LIGHT LABS and keep your lab stocked with genuine DWK Life Sciences products.
Key Features
- 58 degree angle – Exposes more filter paper for faster filtration.
- Long 150 mm stem – Builds a liquid column that speeds flow.
- Heavy walls and molded rim – Built for long service life.
- Fire-polished stem – Smooth, durable finish.
- ASTM E1095 design – Type I, Class B requirements.
Specifications
| Catalog Number | 28900-55 |
| Brand | Kimble (DWK Life Sciences) |
| Description | KONTES 58° 6" Long Stem Funnels, 36 mL |
| Sold As | Case of 48 |
| Glass | Borosilicate glass 3.3 (33 expansion), low extractable |
| Standards | USP Type I; ASTM E438, Type I, Class A |
| Design specification | ASTM E1095, Type I, Class B |
| Funnel angle | 58 degrees |
| Stem length | 150 mm |
Available Options
- 28900-100 – KONTES 58° 6" Long Stem Funnels, 225 mL, Case of 24
- 28900-65 – KONTES 58° 6" Long Stem Funnels, 60 mL, Case of 48
- 28900-75 – KONTES 58° 6" Long Stem Funnels, 90 mL, Case of 48
Applications
- Gravity filtration
- Gravimetric analysis
- Transferring liquids into narrow necks
- Teaching labs
