World's lightest headset spacers...

...or at least that's what the ebay seller claims. I don't know if that's correct or not, but they are pretty light. 10g for 33mm of spacers (15mm spacer, 10mm spacer, 5mm spacer and 3mm spacer).

World's lightest headset spacers in carbon fibre

They're made from carbon fibre and have had the inside's machined out for less weight.

Close-up of spacer showing internal machining of the carbon fibre

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