About This Made of heavy duty cast aluminum alloy with no chemical coating that resists damage caused by the naturally occurring acids found in coffee, ensures long-term use. The dual ends of this tamper(51mm and 58mm) fit most portafilter baskets, evenly distributes, compress and level ground coffee for a denser, richer and more flavorful espresso brew. Extract richer flavor by tamping down your coffee or espresso. Compress ground Espresso into a dense, evenly dispersed puck through which pressurized water flows more slowly for a richer, flavorful extraction. So easy to clean, simply hand wash with water and dry thoroughly. Please don't dishwasher. We are offering all customers a lifetime satisfaction guarantee. If at any point you decide you are not completely satisfied with your purchase, just drop us an email and we will refund 100% of the money.