These funnels offer thermal shock resistance and have an average coefficient of expansion from 20° C to 200° C is 3.56 x 10-5, gradually increasing to 4.69 x 10-5 at 1050°C.
- Made of porcelain
- Fixed perforated plates
- Every batch of porcelain is heat tested in factory
- Glazed on inner & outer surfaces except for the rim
- Glaze is extremely white
- Resistant to chemical action
- Excellent resistance to acids & alkalies, except for hydrofluoric acid