Optimized Compatible with 58mm Portafilters: Designed to accommodate most 58mm coffee portafilters, this holder is versatile Compatible with use with bottomless, single spout, and double spout models. Construction with Premium Materials: Crafted from - aluminum, this portafilter holder promises and robustness. The matte finish not only adds a sleek touch but also resists fingerprints, making maintenance a breeze. Additionally, the POM inner ring offers outstanding ductility and wear resistance, ensuring that the holder withstands the rigors of daily use. Customizable Fit with Adjustable Knob: Tailor the holder to your specific portafilter thanks to the adjustable knob. This customization enables more even coffee distribution and tamping, resulting in a perfectly balanced espresso shot. Essential Accessory Compatible with Coffee Enthusiasts: A must-have Compatible with any or home espresso setup, this portafilter holder aids in precise coffee distribution and tamping. Material:Aluminum Color: Black Specification: 51MM Package Contents: 1*Coffee Portafilter Holder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.