StrongHold PCMB-16 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: 0-33,A-C,+,-,L1-L3,T1-T3, 10 markers per legend, and 10 pages per book.