Knock box Barista BasicsThe Barista Basics Knock Box is designed with quality and durability in mind. Unmatched by any other knock box on the market, they are made with ultra strong ABS plastic and include a removable NBR rubber knock bar. Each unit is packaged with an oversized NBR rubber hush gasket for added resilience and noise reduction. The removable knock bar and sleek ABS design make these units easy to clean. The hush gasket for the Barista Basics Knock Box has been