GHS Strings continues its innovative approach to packaging with the world's first resealable bass guitar string package. GHS Strings "Multi" 2-Packs are sealed at the factory for freshness in a tamper proof package. The exclusive package design includes built-in zipper lock which allows the user to remove only the packs required at a given time and then reseal the package to maintain freshness. The GHS facility is 100% humidity controlled with state-of-the-art equipment and highly skilled technicians that ensure factory freshness in every air-tight Fresh Pack Produced. Each Bass Boomers Multi-Pack Contains two complete sets of bass strings. These packs easily fit into any case!