The Phoenix Contact 1656684 is a versatile heat shrink tubing solution designed for the railway industry, accommodating cable diameters from 1.5 mm to 3.2 mm. This yellow, unmarked tubing can be customized using the THERMOMARK E.CUTTER or E.CUTTER/P for precise marker lengths, ensuring optimal cable management and identification. With a text field height of 5.00 mm and width of 30.00 mm, it offers ample space for labeling, making it ideal for industrial applications requiring durable and reliable cable protection.