De'Longhi Fully Automatic Espresso Machine Repair O-Ring Set of 3, 45mm This is a set of 3 O-rings for repairing De'Longhi 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 area. Applying too much grease can promote the adhesion and residue of coffee grounds, leading to malfunctions and adverse effects.) ※ This is an O-ring set of 3 + approximately 1.0g of grease. ※ The outer diameter is 45mm, the same as the original. ※ The ring thickness (width) is 4.1mm. We also offer 44mm outer diameter O-rings, which allow moving parts to move smoothly even after long-term use and help 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 replacements. Outer diameter 44mm: Recommended for those who tend to neglect maintenance. Both sizes do not affect coffee extraction.