StrongHold PCMB-15 Pre-Printed Wire Marker Books are conveniently pocket-sized and contain wire labels printed on vinyl cloth. Markers are durable enough for up to 5 years and are designed to withstand various outdoor environments. They can also be torn in half to label each end of the conductor. Legend: +,-,0-45, 1/15 markers per legend, and 11 pages per book.