Yes, it is exactly what you think. Electrical tape numbers on my father's golf club covers.
Al and I have offered to make him some lovely covers with the numbers knit in and he'll have none of it. His big sister Eleanore, made these for him, so there can be no better. It's cute.....if you know the story. He golfs at some pretty nice courses; who knows what the ranger thinks when he sees these coming!