A factory sealed Pokémon TCG XY Steam Siege booster box from the late English XY series. Fire and water collide at the Gear Palace, giving collectors and players a distinctive XY set to open pack by pack.

• Set: XY Steam Siege (STS)
• Series: XY, English
• Contents: 36 sealed booster packs, 10 cards per pack
• Set size: 114 cards plus 2 secret rares
• Featured: Volcanion, Xerneas BREAK, Yveltal BREAK

Also available as a sealed case of 6 units.