KCMYTONER HSe211 HS211 HSE-211 HS-211 Heat Shrink Tubes Label Tape 1/4" (5.8mm) x 4.92 ft Compatible for Brother PTD400 D600 PTH300 PTE300 PTE500 PT-E550W PT-P700 PT-P750WVP, Black on White, 1 Pack

I bought this to try out for labeling some custom RF cables. The 5.8mm tubing fits over bare RG316 coax nicely, and it shrinks to fit reasonably well. If you do the math, you'd expect a very tight fit, but it's actually just on there tight enough to not move. Mostly. It can actually be slid up and down the wire a bit.Shrinking it over a much smaller wire does get about the 2:1 shrink ratio, so it seems like it doesn't have the strength to really constrict itself onto smooth cabling.That said, the Brother printers leave a huge blank margin on every label, so you can cut that off, shrink the little cutoff onto the cable, and use it as a cuff to shrink the useful bit of the label around.On my PT-1290, each label consumes about 80mm of tape even when there's no text, so there are about 18 labels per tape. You can stretch this out (pun intended) by printing multiple labels in one go with spaces between them, then cutting them into pieces.