All SGCLABS glassware products of SCIENTIFIC GLASS CREATIONS. meet A.S.T.M. specification E438, Type 1, Class A, (where applicable) , “Standard Specification for Glass in Laboratory Apparatus”.
| Annealing Point | 560°C |
| Softening Point | 820°C |
| Linear Coefficient of Expansion | 32×10-7 / °C |
| Refractive Index | 1.47 |
| Porosity | Catalogue Abbreviation | Nominal Maximum Pore Size, µm | Application |
| Coarse | C | 40 – 60 | Filtration of coarse materials. Gas dispersion, gas washing, gas absorption. Mercury filtration. Extraction apparatus. |
| Medium | M | 10 -15 | Filtration of crystalline precipitates. Removal of “floaters” from distilled water. Extraction apparatus. |
| Fine | F | 4 – 5.5 | Filtration of fine precipitates. Mercury valve. Extraction apparatus. |
| Capacity, mL | Diameter, mm | Capacity, mL | Diameter, mm |
| 5 | 25 | 500 | 102 |
| 10 | 31 | 1000 | 130 |
| 15 | 35 | 2000 | 161 |
| 20 | 38 | 3000 | 185 |
| 25 | 42 | 5000 | 221 |
| 50 | 48 | 6000 | 236 |
| 100 | 60 | 10000 | 279 |
| 125 | 65 | 12000 | 295 |
| 200 | 76 | 2200 | 350 |
| 250 | 83 | 50000 | 457 |
| 300 | 87 | 72000 | 520 |
| Joint Size Number | Approximate Diameter at Small End, mm | Approximate Length of Ground Zone, mm | Diameter at Large End of Ground Zone, mm |
| 7/25 | 5 | 25 | 7.5 |
| 10/30 | 7 | 30 | 10.0 |
| 12/30 | 9.5 | 30 | 12.5 |
| 14/35 | 11 | 35 | 14.5 |
| 19/38 | 15 | 38 | 18.8 |
| 24/40 | 20 | 40 | 24.0 |
| 29/42 | 25 | 42 | 29.2 |
| 34/45 | 30 | 45 | 34.5 |
| 40/50 | 35 | 50 | 40.0 |
| 45/50 | 40 | 50 | 45.0 |
| 50/50 | 45 | 50 | 50.0 |
| 55/50 | 50 | 50 | 55.0 |
| 60/50 | 55 | 50 | 60.0 |
| 71/60 | 65 | 60 | 71.0 |
| 103/60 | 97 | 60 | 103.0 |
| Joint Size Number | Approximate Diameter at Small End, mm | Approximate Length of Ground Zone, mm | Diameter at Large End of Ground Zone, mm |
| 5/12 | 3.8 | 12 | 5.0 |
| 7/15 | 6.0 | 15 | 7.5 |
| 10/18 | 8.2 | 18 | 10.0 |
| 12/18 | 10.7 | 18 | 12.5 |
| 14/20 | 12.5 | 20 | 14.5 |
| 19/22 | 16.6 | 22 | 18.8 |
| 24/25 | 21.5 | 25 | 24.0 |
| 29/26 | 26.6 | 26 | 29.2 |
| 34/28 | 31.7 | 28 | 34.5 |
| 40/35 | 36.5 | 35 | 40.0 |
| Joint Size Number | Approximate Diameter at Small End, mm | Approximate Length of Ground Zone, mm | Diameter at Large End of Ground Zone, mm |
| 7/10 | 6.3 | 10 | 7.0 |
| 10/10 | 9.0 | 10 | 10.0 |
| 14/10 | 13.5 | 10 | 14.5 |
| 24/12 | 22.8 | 12 | 24.0 |
| 29/12 | 28.0 | 12 | 29.2 |
| 34/12 | 33.3 | 12 | 34.5 |
| 40/12 | 38.8 | 12 | 40.0 |
| 45/12 | 43.8 | 12 | 45.0 |
| 50/12 | 48.8 | 12 | 50.0 |
| 55/12 | 53.8 | 12 | 55.0 |
| 60/12 | 58.8 | 12 | 60.0 |
| 71/15 | 69.5 | 15 | 71.0 |
* Comparison Tables for SGCLABS Filter Papers and Watman Filter Papers