I bought these as the rubber base seals were perished on my otherwise perfect one year only grey '68 washer jets so I bought these purely for the rubber.
As you can't buy these seals separately having to buy the complete jet is an expensive option and it's a shame to discard the otherwise perfectly formed brand new jet, but if you literally just need the seal the moulding quality is good they fit well and it get the job done.
Perhaps it's time to offer the seals separately JK?

fast excellent service

Very good fit have be buy most of my parts from JK over the past 3 years all way had good parts that fit well and this was one off them ,but use hot water to fit like they say :-).

Washer jets a good purchase , shame that they are slightly larger and black aposed to the grey originals that were on my 68 bay .

Fit and look the same as the originals on my 1969 Early Bay

Bought this for my 1986 T25. Perfect fit, great quality. Twist and prize out old part carefully and cut hard hose end off (there's a bit of give) then soak end of hose in boiling water to help new part on. Twist and push new part in. Can re-position direction of nozzle with pin. Works a treat.