SPECIFICATIONS Brand Name: MHW-3BOMBER Feature 1: Magnetic Feature 2: 58mm Coffee Dosing Funnel Feature 3: Compatible with 58MM Portafilter Feature 4: Espresso Dosing Ring Feature 5: Home Barista Accessories Hign-concerned Chemical: None Kit Type: Two-piece Set Material: Metal Origin: Mainland China Product Details *Material: Made of food-grade aluminum alloy. 58mm inner ring, 73mm outer ring, 17mm high,58g in weight. *Regarding magnetism: The most commonly used 304 steel will show different degrees of magnetism after cold processing, but for some powder bowls such as ims, wpm and other brands, the magnetism is weak. *SUITABLE FOR 58MM PORTAFILTER-Designed to work with the 58mm Portafilter baskets. MHW-3BOMBER 【Brand Guarantee】- MHW-3BOMBER focused on manufacturing coffee appliances and various accessories. We will always focus on creating a better coffee drinking experience for you. If you have any questions or suggestions when purchasing our products, please contact us, we will serve you wholeheartedly the first time. 【30 DAYS MONEY BACK】- To facilitate your purchase decision we take the risk on us! We offer free return.In case you are not satisfied with our products, you will get your money ALL BACK.