| Product Type: | Coupling |
|---|---|
| Connection Size: | 3/8" |
| Connection Type: | ODS |

Hi Ben. The 06 in the part number indicates it is 3/8" ODS. If it were 08 in the part number (5505-08B-08) it would be 1/2" ODS - https://www.supplyhouse.com/Parker-Hannifin-5505-08B-08-1-2-ODS-5505-08B-08-Series-Female-Resealable-Quick-Connect-Coupling