FullNine 6.0 (plug for small hole in seat tube?)

[Bryan995]

My FullNine 6.0 has a small 3/8" / 9.5mm hole in the lower part of the seat tube.
Not sure what it is for, but it is not used by anything.

It originally was covered by a small circualar patch (waterproof tape?) - but has since fallen off.

Anyone know of a plug that can be purchased that would fit to keep the grime/water out?

 

[MisterM]

My FullNine 6.0 has a small 3/8" / 9.5mm hole in the lower part of the seat tube.
Not sure what it is for, but it is not used by anything.

It originally was covered by a small circualar patch (waterproof tape?) - but has since fallen off.

Anyone know of a plug that can be purchased that would fit to keep the grime/water out?

Maybe it's for a dropper post cable? A rubber plug is probably the easiest solution - hardware store might have one - or check Amazon

 

[Bryan995]

Thanks. Searching for dropper seat post hole plug helped a bit.

Found some people discussing using 3M 2228 tape.
3M 2228 Scotch Moisture Sealing Electrical Tape, https://www.amazon.com/dp/B001B1AP3O/

Also found these 3/8 plugs. May buy a few and give them a shot.
http://www.widgetco.com/hole-plugs-covers-3-8-black

Will also try a HD/Lowe’s and see what the have. Ideally could find a plug designed for a hole in a tube.