Brady Authentic (M21-187-C-342) PermaSleeve Heat Shrink Tubing for Control and Electrical Panels, Wire Harness, Black on White-For M210, M210-LAB, M211, BMP21-PLUS and BMP21-LAB Printers, .335" W 7' L

I received my Brady label as of October 7, 2025, it has a yellow color, fits perfectly for my Brady M210 labeller, I hope this will fit to any sleeve, I recommend buying this from Brady its quite pricy for a label but its genuine, you get what you paid for!

Great for numbering or lettering cables!

I got my new Brady permasleeve labeling, M21-187-C-342, and it works great. It fit well on shielded 22GA, 3 conductor wire and shrank to fit mil-spec 20 gauge. I am happy that it handles 3 rows of text, albeit very small after shrinking, but it’s there and clear to read. For my labeling, I find my labels are all 1" to 1 1/8", so you can get about 76 labels out of a roll at that length. They are very easy to make, apply and appear to hold up well. Recommended.

I recently labeled about 350 wires with permasleeves. This saved me from peeling the backing off that many labels and rolling them on the wire. It's not a huge time saver - unless you are producing labeled wires on a workbench with the proper gadgets to support speed. The main benefit, after not having to peel them, is how uniform and special they look. I was mostly doing 18ga MTW with a pretty thick insulation, and the fit was good. At times I had someone printing them out for me, but it would have been nice if they could open them as easily as I could, would have saved more time. This is the good news. The bad news: they can be tough to open to fit on the wire, if wire is pre-stripped the strands want to catch on the sleeve so you may need to wind them first, cannot use quick strippers if the label is already on and close to the end, the printed characters may shrink or become distorted after shrunk, when using open flame it can brown the label or burn the wire insulation, they are not as stuck in place as sticky labels so they may slip, and last but not least...they are expensive.

These sleeves work great I do wish they would advertise the wire size for the perma sleeves rather than simply measurements in mm width - - I bought 2 before I got the correct size that I needed, I recommend these sleeves - they go on and stay on

This tape is expensive but the knockoffs don’t work. Bite the bullet and pay OEM prices.

Work well

started wiring my n-scale dcc layout and discovered the heat shrink labels. just the perfect size for labeling all my dangling lines so i know what i'm connecting to who and why.