Features a rectangular area to allow identification with an indelible marker. 4.8mm wide for max. bundle diameter of 43mm. Overall length 190mm. Marking area 8 x 28mm. Quantity 100 per packet.
Having actually worked in cabinets quite a bit worse than that, without labels, I can tell you that yes, you can do it. But you'll waste an entire day tracing a single cable if your not careful. (and disconnect a few systems if you're really careless)