DeLonghi Fully Automatic Espresso Machine Repair O-Ring Set of 3, 45mm This is a set of 3 O-rings for repairing DeLonghi fully automatic espresso machines. Approximately 1.0g of food-grade grease is included. (The grease is placed in a food-safe zip-lock bag within the cylinder shown in the photo. The cylinder is not included. → Approximately 1.0g is sufficient for one replacement - application to the O-ring & sliding contact areas. Applying too much grease can promote the adhesion and residue of coffee grounds, leading to malfunctions and adverse effects.) * O-ring set of 3 + approximately 1.0g of grease. * Same outer diameter of 45mm as the original. * Ring thickness (width) is 4.1mm. Also available is an outer diameter of 44mm, which allows for smooth movement of moving parts even after long-term use and helps prevent breakdowns. Please choose according to your needs. Outer diameter 45mm: Recommended for those who want the same size as the original and can perform regular maintenance and replacement. Outer diameter 44mm: Recommended for those who tend to neglect maintenance. Both sizes do not affect coffee extraction.