Made of high quality material, durable and practical to use. Exquisite and delicate, highly matched with equipment This O ring is located twice in the for Delonghi brewing unit and once on the brewing piston. Model compatibility for EAM, for ESAM, for ECAM, for Prima Dona, for Perfecta, for ETAM For Delonghi brewing unit like the plunger Suitable for Delonghi coffee machines, and like devices of the same construction. Part number:5332149100 Colour:Red Material:Silica gel Size:Diameter 36mm;width 4.1mm Package Contents: 10 * sealing ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.