just ordered a koso instrument cluster. got an email from the order fulfillment guys informing me that the kit doesn't come with a water temperature sensor adapter, but if i let them know what size i need they'd be happy to throw one in. (neighborly of them since its a $30 part.)

catch is, i have no stinking clue. im not event exactly sure which hose coming off the water pump i'll be splicing it into.

anyone familiar with this?

he said i need to match the interior diameter of the hose.
available sizes are:
14 mm
16mm
18mm
22mm
26mm