What size disconnect do I need to remove fuel filter

Thanks for your reply. The one side has the clip to remove the hose. The other side requires a special tool that slips over the fuel line and is pressed into the disconnect to release the spring. That's the size I was needing to know.

Whatever fits the filter! .. Take it with you for sizing..... Easy to use caliper for measuring is open end wrench! ....... 5/16 = 8mm