- ST 20/23/23
- ST 20/23/24
- ST 20/23/42 - Discontinued items - no longer available
- ST 20/4/23
- ST 20/4/24 - Discontinued types - not for new designs
- ST 20/4/42 - Discontinued items - no longer available
- ST 20/44/23 - Discontinued items - no longer available
- ST 20/5/23 - Discontinued items - no longer available
- ST 20/69/23 - Discontinued types - not for new designs
- ST 20/69/4 - Discontinued types - not for new designs