Brother HSE231E is a heat-shrink tube cassette for identifying cables and providing insulation. Print cable labels with a Brother-compatible labelling printer, then shrink the tube around the cable.
This variant has black print on white tube and a width of 11.2 mm. Brother specifies it for wire diameters from 2.1 to 7 mm, making it suitable for marking cables within that range.
The tube is made of polyolefin and has a 3:1 shrink ratio.