Lifted from the latest Scrutineers' Bulletin. A quick reminder that HANS devices, tethers and posts are not multi-compatible and you need to check that your current device fits your latest helmet!
I suppose
caveat emptor when buying second hand. There could soon be a flood of "cheap" HANS devices as helmets are renewed with "new" standard posts and fittings that don't match up with the existing standard. FHRs aren't lifed, but beware of the standard shown.
"
Helmet and Frontal Head Restraint compatibility
The FIA set out in their Appendix L, III-3.3 the compatibility and permitted use of items approved to the FIA 8858-2002, 8858-201, 8860-2004 and 8860-2010 standards, and have provided the following handy reference to go along with this."
I've reproduced the diagram on
www.racewear.co.uk/blogging.