General Pump Kit 21 HEAD RINGS 20mm, fits General Pump GP K21 KIT21 Interpump (set of 6)
General Pump Kit 21 Replacement Head Rings 20mm (set of 6)
Fits General Pump Models:
| T521 | T531 | T701 |
| T711 | T721 | T731 |
| T9071 | T9321 | T9711 |
| T9721 | T9731 | T9791 |
| T991 | T9951 | T9971 |
| TS1371 | TS1491 |
Fits Interpump Pump Models:
| W52 | W53 | W70 |
| W71 | W72 | W73 |
| W91 | W921 | W972 |
| W973 | W979 | W98 |
| W99 | W995 | W996 |
| W997 | WS137 | WS149 |