These washers fit most of the small classic petrol/white gas stoves such as the Svea 123 & 123R, Optimus 8/8R, Primus 71 (not all - check dimensions - other type also sold), Optimus 80, 111, 99, 199, 535 Radius 46 & 42 (variant with cap on top of tank) etc.
This washer also fits the chain mounted storage cap of later Primus 210 & RM 1 pint stoves
VITON OD18mm ID10mm
Cap shown not included - for guidance only
Product Code: FCAP1810 - C-D3