Come and see our amazing products. Made of rubber, durable in use, non-slip and avoid scratch your portafilter or your hand. Rubber bar and plastic body are able to reduce the noise when using. When the coffee knock box metal door filter is closed, the coffee grounds now fall directly into the grinding box.. Raised rear wall prevents splashingCoffee puck knock box interior can be comfortably rinsed with water. Pls confirm with us about the packing info, stock color and exact production time before placing your order.