The 53mm adjustable dispenser and Tamper-53mm base are designed for use with the tapered Breville 54mm portfilter basket, including Barista Express, Pro, Touch, Bambino Plus, Infuser, and Duo Temp Pro. Consistently brew - each time you brew, you should maintain a uniform distribution and pressure, so that you can easily play a perfect shot at home. Before tamping, you should level the ground, so that you can form a uniform tamping effect. Adjustable depth - set the required tamping depth and maintain the same tamping pressure each time. Double head distributor/leveler and tamping machine are designed as a whole and can be used on both sides. Professional tips: Make sure your filter basket is filled with coffee powder to obtain proper pressure from the tamping machine, so as to obtain tighter packaging and stronger flavor. For best results, comb the top of the basket with your fingers or flat edges before leveling and tamping. Brewed with high quality filtered water.