| 0S31 | K0013 | HALL AND HALL LTD |
| 0S31 | U4330 | HALLITE SEALS INTERNATIONAL LTD T/A I POLYTEK |
| BS328 | K0013 | HALL AND HALL LTD |
| BS1806-328 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS328 | U4330 | HALLITE SEALS INTERNATIONAL LTD T/A I POLYTEK |
| BS328/HV170 | U4330 | HALLITE SEALS INTERNATIONAL LTD T/A I POLYTEK |
| VF328HV170 | K0013 | HALL AND HALL LTD |
| BSM48-328 | K7766 | BRITISH STANDARDS INSTITUTION |
| VF328HV170 | U4330 | HALLITE SEALS INTERNATIONAL LTD T/A I POLYTEK |