About this item HIGH QUALITY & STRONG STABILITY: The perfect espresso knock box for machine accessories, Durable and stable espresso accessories for coffee bar. PERFECT SIZE: Prevent coffee grounds from splashing with this espresso knock box, Protect your portafilter and hands with shock-absorbent knock box. INNOVATIVE DESIGN:Transform yourself into a professional barista with this espresso knock box, Anti-Slip rubber pad for strong stability and noise reduction. EASY TO CLEAN: Minimal maintenance required for this espresso knock box, easy to clean and store. MONEY BACK GUARANTEE: Buy with confidence and get a refund or replacement if needed.