To make sure you know which cable is which, reach for these markers from HellermannTyton. The tags simply slide on, so fitting is speedy. You can mix different numbers and letters to create unique cable IDs. A chevron design means multiple markers lock together without the risk of them twisting out of place. To ensure they're easy to read from a distance and in poor light, the legend is printed in white against a black background.

• Pack of 250 is handy for labelling complex installations
• Made from durable and chemical-resistant PVC
• Cadmium-free and flame-retardant to help keep installations compliant with safety standards
• Operating temperature range between -65°C and +105°C, for use in plant and heavy industry

• Aerospace technology
• Food and beverage production
• Telecommunications systems

They're sized to fit cable diameters between 1 and 3mm without slippage.