| Series | WS20 |
| Image | Supplier | Item Code | Short Description |
|---|---|---|---|
| | SOUTHWARK METAL MFG CO | SOU WS20210 | 20 2-1/4X10 COLLAR WS20210 |
| | SOUTHWARK METAL MFG CO | SOU WS20212 | 20 2-1/4X12 COLLAR WS20212 |
| | SOUTHWARK METAL MFG CO | SOU WS20310 | 20 3-1/4X10 COLLAR WS20310 |
| | SOUTHWARK METAL MFG CO | SOU WS20314 | 20 3-1/4X14 COLLAR WS20314 |
| | SOUTHWARK METAL MFG CO | SOU WS20214 | 20 2-1/4X14 COLLAR WS20214 |
| | SOUTHWARK METAL MFG CO | SOU WS20312 | 20 3-1/4X12 COLLAR WS20312 |
