The 58mm Portafilter VST Precision 25gram Triple Filter Basket is available in Standard and Ridgeless Versions, the new VST Precision FIlter Basket holds 25 grams and is VST's largest filter basket. The 25gram basket has a height of 30mm, and a dosing capacity of 24-26grams. Suits most E-61 group heads and any group that measures 60mm in diameter and work with a 58.3mm tamper. Recommended for use with the following machines: La Marzocco, Synesso, Nuova Simonelli, Faema, La Cimbali and Rancilio with standard portafilters. Also compatible with the La Marzocco SWIFT Grinder. Basket Height 30mm. Note: Please check the measurement of your current baskets and handles to ensure correct fitting Features: VST's new filters deliver consistent extraction performance All VST Filters are warranted for ZERO defects! 100% of holes are measured on every filter for minimum and maximum range limits on area and diameter All holes are measured for circularity, placement, square area and blocked holes Filters are matched for total square opening to +/- 5% to ensure identical group-to-group performance (typical filters vary from - 50 to +100%)