The Brady PWM-PK-1 are vinyl cloth Porta-Pack® wire markers. These B-500 repositionable vinyl cloth Porta-Pack books are a convenient way to ensure the wire markers you need are always on hand. Choose from 15 different books featuring numbers, letters, special symbols and NEMA colors. Each book comes with 10 pages and includes a terminal marker with each wire marker. Over 250 different refill packs are also available (sold separately).