Sparkplug defouler/O2 sensor spacer

[FNK]

Does an Oxygen sensor have more than 1 size?
I cannot find the information as Im about to order a plug spacer on Ebay;
BLOX SPARK PLUG DEFOULER UNIVERSAL HONDA NISSAN JDM...

[FNK]

Im take the guess that they both are M18x1.50 thread, and ordering 2. We'll see!

[turbo_bootin]

I would have just gotten them locally; they're not that expensive at Advance, Autozone, etc.

[bw86]

Autozone sells them for like $3

[FNK]

There is no such thing in Canada, at least in Quebec... Not even Napa got them.

[Polski]

Any luck on finding out??