http://www.ebay.co.uk/itm/Universal...pt=UK_Motorcycle_Parts_13&hash=item2ed64ada70 not black but got these, look good and well made but you need to be Hercules to actually use them to adjust preload. They just need to be 19mm
Always found Oberon kit to be of good quality. http://www.ebay.co.uk/itm/Oberon-Pe...382?pt=LH_DefaultDomain_3&hash=item20da1eb2ae
I've had an Oberon master cylinder pot cap and oil filler cap in the past and been very happy with the quality.
I found them to be a gimmick. As Slick says you can't actually use them unless your swinging from them.
Maybe so but when you've ruined yours by adjusting them with anything other than a feather duster at least they'll cover your hand fisted damage! My old Gixer K3 ones were mullered but they looked mint with anodised blue adjusters fitted!
That's why u wanna use some paper roll or the likes between the nut and socket. I also fell foul to the anodising on previous forks getting damaged when adjusting the preload before.
I use masking tape ... but a small bit slipped and marked the preload nut slightly hence was looking into the adjusters to avoid it happening again. But if they are just useless bling I won't bother. The whole point was to be functional!