HIC's Dual-Sided Espresso Tamper compresses ground espresso coffee into a puck that's level and dense for a richer, more flavorful espresso brew. Made from heavyweight aluminum; resists damage caused by the naturally occurring acids found in coffee; strong and durable. Compress ground espresso into a dense, evenly dispersed puck through which pressurized water flows more slowly for a richer, flavorful extraction. Creates a necessary gap between the top of the grounds and the machine so the dampened grounds don't swell and clog the water disbursement screen. Dual ends (50mm and 55mm) fit most portafilter baskets; 4-ounce weight for effortless tamping; hand wash in warm, soapy water.