★ O-rings for De'Longhi Fully Automatic Espresso Machines - Repair Kit - Set of 3 - 43mm ★ O-rings for repairing De'Longhi fully automatic espresso machines. Available while supplies last. Please secure these for repairs. We do not recommend using anything other than silicone O-rings, as they are used in high-temperature areas. ・This is a set of 3 O-rings. ・Size: 43mm (Genuine is 45mm) ・Ring thickness: 4mm ・Made of heat-resistant silicone! Excellent elasticity and heat resistance. ・The second photo shows an example of how the O-rings are used (the product is only the O-rings). The ring's inner diameter is 43mm, slightly smaller than the genuine 45mm. There are no problems with installation or coffee extraction. With the genuine size, the watertightness is high, but the resistance of the moving parts is also high, and the resistance increases due to the accumulation of debris during long-term use, which puts a load on the mechanism. The 43mm size allows the moving parts to move smoothly even after long-term use, preventing breakdowns. We also sell the 45mm type, which is the same size as the genuine one, so please choose according to your style. Both sizes have no problem with coffee extraction. 45mm ⇒ Recommended for those who want the same size as the genuine one and can perform regular maintenance/replacement. 43mm ⇒ Recommended for those who tend to neglect maintenance. There are many voices on overseas sites that recommend the 43mm size.