Auto Calibrated Espresso Tamper:Our calibrated tamper with 2 interacting constant force springs and a stopper,Allows the pressed powder to remain at the same level each time. and always keep pressure at 30 lbs. Numerous tests have shown that 30lbs press force results in a more balanced and delicious espresso taste. Food Safe Stainless Steel Tamper:Our hand tamper has an ergonomic handle with a comfortable grip that allows you to push ground coffee easily.You will get a flat concentric ring pattern in your portafilter by using pusee espresso tamper. Great for Professional Baristas:We are so confident that you will love our espresso tamper.You will never need to buy another tamper again, and will save time, money and frustration. everyone can afford to a cost-effective and high quality calibrated tamper. Quality and Size:Espresso Tamper is 51mm precise dimensions tampers, Which can be perfectly matched with various type of espresso portafilter baskets.Please check your portafilter size before purchase. Ideal for Professional Baristas: This coffee tamper tool helps espresso enthusiasts looking to get better consistency from shot to shot and brew a better-tasting coffee. 51mm Espresso Tamper Compatible with Delonghi Espresso Coffee Machine Premium Barista Espresso Coffee Tamper with Dual Calibrated Spring Loaded Flat Stainless Steel Base, Constant 30lb