De'Longhi Fully Automatic Espresso Machine Repair O-Ring Set of 3, 44mm 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 using the cylinder in the photo. The cylinder is not included. → Approximately 1.0g is sufficient for one-time replacement - application to the O-ring & slide contact area. Applying too much grease will promote the adhesion and residue of coffee grounds, leading to malfunctions and adverse effects.) ※ O-ring set of 3 + approximately 1.0g of grease. ※ Outer diameter is 44mm (Genuine is 45mm) ※ Ring thickness (width) is 4.1mm. Although the outer diameter of the ring is slightly smaller at 44mm than the genuine 45mm... There is no problem with installation or coffee extraction. The 44mm size allows for smoother movement of the moving parts even after long-term use, and is more likely to prevent malfunctions. We also offer the 45mm type, which is the same size as the genuine one. Please choose according to your style. 45mm: Recommended for those who want the same size as the genuine one and can perform regular maintenance and replacement. 44mm: Recommended for those who tend to neglect maintenance. Both sizes have no problem with coffee extraction.