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The perfect accessory for manual and semi-automatic espresso machines, the Rocket Espresso Stainless Steel Knock Box lets you dispose of spent pucks in style. The polished finish and its rounded shape make this knock box stand out from the crowd. The knock bar is protected by a rubber wrap to absorb the force from your portafilter. The Rocket Espresso stainless steel knock box has a large 30oz capacity and features durable construction capable of withstanding daily use.