About this item UPGRADED V4.1 DESIGN - Enhanced spring-loaded mechanism delivers uniform pressure with an audible "click" for consistent ensures barista-grade consistency for flawless espresso extraction SELF-LEVELING TAMPING - Features a stabilized self-leveling base and a three-spring calibration system that ensures even distribution and optimal contact pressure, reducing channeling CONSISTENT PRESSURE CONTROL - Patented internal spring mechanism with three interchangeable springs (15lb, 25lb, 30lb) lets you easily customize the tamping force SLEEK AND FUNCTIONAL DESIGN - Constructed with a robust 304 stainless steel base and an anodized aluminum handle for durability and a comfortable, ergonomic grip VERSATILE SIZING OPTIONS - Available in multiple diameters (45.5mm, 49.7mm, 51mm, 51.5mm, 53.3mm, 58mm, and 58.5mm) to perfectly match your espresso machine's portafilter