Head gaskett kit question

Hi everyone, so I'm fitting a new headgasket to my 200tdi Defender and I bought a good quality kit. What I'm wondering is, where do all the little bits go that te in the kit. Such as

Big 1 inch brass washer
2x grooved brash washers with a notch in them
Lots of little 8mm brass washers
Thing rubber seal/band

I'd havnt come across anywhere that would need the parts mentioned. Seen as I have them though I'd like to use them seen as they're in the kit.

Thanks

Glow plug and or injector washers. Valve steam oil seals Oil & water way orings and washers etc etc. be surprisd how many bits there are on a cylinder head.