The U-Mark U-Phase patented design allows a fast and easy way to apply color coding to any type of wire. Whether it is electrical wire, audio or video wire, or low-voltage wiring. The U-Phase pen allows you to easily color the wire at a fraction of the cost of other methods, such as vinyl electrical tape. The markers conform to the N.E.C. code and conforms to ASTM D 4236. The marker can mark up to #6 AWG wire.
The ink dries fast in roughly 40 seconds and is highly visible, resists handling, heat and UV light. The product is available in 11 colors as well as a single phase color 4-pack and a 3-phase color 4-pack. Made in U.S.A.