Knock Box Basic Black for Barista 4" with food grade silicone, knock bar removable for easy cleaning, dishwasher safe Espresso Knock Box for coffee grounds in 4" for Home Baristas & Bars & Coffee Shops Coffee Espresso Knock Out Box in dishwasher safe high quality plastic Removable knock bar covered with food grade silicone, ends in stainless steel Round silicone base ring reduces noises and is shock absorbing Easy to clean, coffee pucks can be composted or combusted in grills & BBQs, JoeFrex Logo on the bottom