Kroy makes a compact labeler that prints on heat-shrink tubing. I also use Brother "P-Touch" labels under clear heat-shrink. Actually, almost anything under clear heat-shrink works. I've had mixed results with the 'self-laminating' kinds. Unless you use a stable ink (NOT sharpie), they tend to bleed and spread over time, eventually becoming unreadable after about 5 years. Panduit makes a pen specifically for marking nylon. Staedtler also makes some nice pens.
-Cam.
