| VNR M5 FF | M5 non-return valve, female-female |
| VNR 1/8 FF | 1/8" non-return valve, female-female |
| VNR 1/8 MF | 1/8" non-return valve, male-female |
| VNR 1/8 MFR | 1/8" non-return valve, female-male |
| VNR 1/4 FF | 1/4" non-return valve, female-female |
| VNR 1/4 MF | 1/4" non-return valve, male-female |