HIGH QUALITY MATERIAL:Made of rubber, durable in use,and avoid scratch your portafilter or your hand | PERFECT SIZE:4.72X3.90X4.92 Inch (L*W*H).It's perfect for most espresso machines.With enough capacity,it could prevent coffee grounds from splashing all around | MULTIPURPOSE:It could be used in coffee shop, western restaurant, bar, home kitchen etc. | EASY TO CLEAN: You can clean it by hand,dishwasher safe, save your time on the washing the coffee tool | 100% MONEY BACK GURANTEE: If DOA received or unfourtunately your Coffee Knock Box did not work smoothly, kindly contact us for exchange,return or refund .YOUR FEEDBACK WILL BE APPRECIATED