Battle.net Pre-Paid Game Card

The Battle.net Pre-Paid Game Card were redeemable game cards for the Battle.net Balance. It was replaced by the Battle.net Store Gift Card Balance in 2017.

From Amazon.com:
 * Provides $20 for you to charge up your Battle.net balance
 * Use your Battle.net balance to purchase digital games, items and services
 * Log onto Battle.net to prove your skills in epic multiplayer matches, embark on thrilling adventures and meet up with friends