https://www.cablecraft.co.uk/letter-o-black-on-white-easi-lok-markers-2-8-5-0-dia-halogen-free
ELHF1/3 B/W O - Easi-Lok Halogen Free Black on White Cable Markers
Easi-Lok black on white halogen free cable markers by Cablecraft Ltd. Cable dia. 2.8-5.0mm. Marking: Letter O. Mainland UK next day delivery.